A researcher of magic with a body containing countless insects. Currently living in the sewers beneath Kagutsuchi. In order to maintain its existence it requires a large amount of vitality, which it obtains through attacking humans and Kaka. One day, it senses a disproportionally large energy source and begins to move.
Transcript of Arakune's Calamity Trigger arcade.
|Stage IV: Bang Shishigami|
I seems I been de ted Some com . Who?
Bang: Waaait, wait wait wait wait wait! I said waaaaaaait! Did someone call for a superhero? No matter! A superhero has arrived! The protector of the peace, dreams, and order of Kagutsuchi is here! Bang Shishigami, a man whose passion burns whenever there's a battle around, has arrived! You must be Arakune!Arakune:
Hiss Yo smell im cile. Hmm rather not involve .
Bang: Hmmmm. I guess I didn't even have to ask. That simple yet strange expression. Those looks. You must be him. The evil ghost who attacks the residents of Kagutsuchi! No matter what strange sorcery you may use, you cannot escape my sight! Today you evil deeds shall end! I, Sir Bang, will punish you!Arakune:
oddly red. really loud...
Bang: Waaaaait! Are you trying to run away!?
Bang: Gaaaaaaah! M-Mortified...Arakune:
No need consu him . looks eally nasty. Hguhguhguh...
|Stage VIII: Iron Tager|
Tager: I didn't think I'd bump into you here. Long time no see.Arakune:
This s org ni . consi er er col . organ mass sh hell ou here. Ghuguh hrk.
Tager: If only they could see you now... How they would grieve... Not only her, but Kokonoe as well.Arakune:
Ugghh augh konoe, id yo say Ko noe!? Gggg uggh...! Nooo, it's like that! I—NO NO NO! I'm real — Aaargh, dammit! T Azure Azure! Damn God Gugh arrrrggghh Keeheeheeheehee
Tager: You've fallen...
Tager: Ugh... impossible... I can't let you roam around like this...Arakune:
never inten eat yo from start. damn idiot . Goo b .
|Stage IX: Hakumen|
se it! can see ! I smell near! Azure This Az I look !
Hakumen: Are you captivated, insect?Arakune:
D n't think I would be caugh Huh? 's ? don't feel color .
Hakumen: So this is the result of passing through the Boundary and into the present. It would appear you couldn't handle the wisdom you gave your body for.Arakune:
Shut hell up. You not ! Damn , are planning to take Azure!?
Hakumen: Regardless of what we look like or what dimension we exist in, deep down, you and I are very much the same.Arakune:
Azure it's Azure. If have Azure, no one can... time coming! Th Azure is gushing in Azure! Keeheeheeheeheeheeheeheeheeheeheeheehee
Hakumen: The time is fast approaching, then. We must hurry. I'm afraid you're too corrupt to be part of the justice I seek, my brother. I am the white void. I am the cold steel. I am the just sword. With blade in hand shall I reap the sins of this world, and cleanse it in the fires of destruction. I am Hakumen. The end has come!
Hakumen: Guh! How dare you interrupt me, Grimalkin!Arakune:
stsagnant feeling coming! Thi is Azure, Azure! Ahhhh, how delightful! incredible! Haha ahahahahah.
|Stage X: Nu-13|
Sheol Gate AD2199/12/31
Nu-13: Loading...loading...loading...loading... Complete...Arakune:
I've been waiting en waiting long time ! The Azure, please azure blood of the beast!
Nu-13: Scanning: complete. Auto-mode: confirmed.Arakune:
Ahhh Aah Ahaha Hguhguh ghahahaha Aaahahah
Nu-13: Scanning: complete. IFF determined. Processing... Subject determined to be hostile.Arakune:
Nu-13: Now beginning termination of subject.
...wanted to surpass her...
I updated my journal today. New things are always very exciting. Our meeting today was about using seithr to create weapons. I have no idea who keeps bringing that up. I hate sitting in that room, with its hard chairs and harder people.
I feel really depressed. It's all because of something someone said to me. I don’t hate Kokonoe. She took good care of Litchi and me, and unlike the others here, I don’t plan to denounce her theory. Her skills and her mind are way beyond what a normal person can hope for. Putting that talent to waste just pisses me off. If I had that skill...Ugh.
I've been getting a lot of stomachaches lately. Every time it happens, she says, “Hang in there,” and cheers me up. I’m grateful for it, but...
Kokonoe hasn't brought in any test animals for a while. I thought she'd just throw this one in Jotunheim, but she told me it was her assistant. I wondered why she chose a monster, but I was afraid I’d get yelled at if I spoke up, so I kept quiet. Still, if that wasn’t bad enough, Kokonoe told me, “He’s inexperienced, so please take care of him,” and made me take the creature along on my investigations. I talked to the creature a little bit, and it doesn’t seem like a bad guy, so that’s something...
I've made a discovery. I was so immersed, I completely lost track of the time. I wrote most of it in my report, but I'll put some of it here too. It's regarding the seithr people often use, but don't understand. Some suggest it's the realization of fairy tales or the result of human sacrifice, but they're all wrong. Seithr is actually a kind of nanomachine.
I'm explain itclearly... Why doesn't anyone get it?
Day 2Why? This is all wrong. We won't make it in time.
every . I want to who it is, no long have mouth. She again. O course.. if don't have face, I make one.
Ahh, itchi, I here.
Calamity Trigger Reconstruction
Summary of the Calamity Trigger Reconstuction from BlazBlue: Continuum Shift Extend.
Having run away from Sector Seven, Arakune found himself within the 13th Hierarchical City of Kagutsuchi, becoming a monster lurking within its sewers. The Novus Orbis Librarium issued a bounty on him, and the monster fed on the kittens of the Kaka in Lost Town, having constant scraps with Taokaka, the clan's guardian.
In the late December of 2199, Arakune was found by Ragna the Bloodedge. The monster sensed the Azure on the man and attacked him, but were interrupted by Litchi, who had become a doctor within the Hierarchical City to protect others from Arakune and to save Roy. Arakune lay on the ground while Ragna and Litchi talked about him before finally escaping. 
It was originally a researcher of Sector Seven, who opened a forbidden door in his zealous search for the truth. It transformed him into an amorphous creature that housed countless insects within its body. It wanders while searching for a "strong life force" that will sustain its existence.
Transcript of Arakune's Continuum Shift arcade.
|Stage IV: Taokaka|
Taokaka: Y-You're the squiggly guy! Meow. You promised to stay out of trouble!Arakune:
You nothing replica ages ast. I ve use you. I seek is Azure. If get i m wa , I ll devo you.
Taokaka: Meow... I still have no idea what you're saying.Arakune:
You... ur combat ecs imp ive... ality, endur ... high... But telligence... lacking.
Taokaka: I don't know what you just said, but... For some reason I feel like you just made fun of meow!Arakune:
don't ha ti for idiots. appear.
Taokaka: You're still worth lotsa money, so I'm gonna beat you up and turn you into spending cash for the Kaka village... Get ready!
Taokaka: Mew... Y-You got... stronger, squiggly... I'm sorry, everybody...
Arakune: Bon petite!
<Arakune goes to eat Tao, but is stopped by Bang>
Bang: Toh! Taokaka, are you all right? Eh!? What's this?! Villain! Your ink-stained mask cannot hide your evil! You dark attack my cute disciple! I will have justice!
Taokaka: ... Thank you, scruffy man. But, I don't remember becoming your disciple...Arakune:
Red... I ha no tim ... To aste you...
Bang: H-How dare you run!? Waiiiiiit!
|Stage VIII: Carl Clover|
Carl: You are... Mr. Arakune, correct? I remember seeing you on the wanted list...Arakune:
Ugh...! Is at cau ity weap !? I ow th ... I know this feeling... Yes, I remember this... The emanation from... Kokonoe...
Carl: Do you... know my sister?Arakune:
Caus ty pon. Nox Ny es Ni ana! Th are nine gether... Yes, ye ...Ko noe... This your secr ! secret! Keehehehe!
Carl: It seems you know quite a bit. I don't know if I'll be able to extract any of that information from you, but as they say... better safe than sorry.
Carl: Ugh, you're rather strong... Sis, are you OK? I can still fight... Sis, will you help me...?Arakune:
That ight... Th ca ality weap ... If I a sorb this... No, that wo 't work... won't fit... mechanical... -hat's why... is s Koko e's... Kikikikii!
Carl: Ah. Wait!
|Stage IX: Litchi Faye-Ling|
Litchi: I thought you would come here...Arakune:
You re not... wi in my me ries...
Litchi: I felt it, too. I was able to sense the Azure. Lao Jiu is doing his best, but I guess it's spreading faster than I anticipated.Arakune:
You c lor... I see u've absorbed too... A sorb... Hahahahaha... HAHAHAHA.
Litchi: I have no regrets. This was the only way for me to stop you. To tap into the power that lies beyond the Boundary...
Arakune: The power of the Boundary is immense, but it is that same power that runs through the Azure. If you have tapped it, then you too will be drawn in... Like us...
Arakune: Litchi, this is a line you must not cross. You can still be saved. Return to Kokonoe. She will know what to do. Damn her, but she is a genius... Kehehe!
Litchi: No, hold on! Don't lose yourself again!Arakune:
Taka... Taka... Takamagahara...! Kiihehehehe! That's how they... Monitor... monitor... monitor us!
Litchi: Ngh... ugghh...Arakune:
Wh- hat is this... woman... Is n in y mories. I see... Azure.. Th zure near...
|Stage X: Hazama|
Hazama: Whoa, didn't think I'd find you here, buddy...Arakune:
Azure, Azure, Azure... I so bright... It's so rong... The Azure I ve been sea in for all long...
Hazama: *Sigh* Even the power of Izayoi didn't help her... Ah well. I didn't see this coming, but with the Azure this concentrated, I suppose it was only a matter of time.Arakune:
I fe Azure com fro you, o... Az , Azure! Why...w is !? The Azure oire is th rce... life... I infinite!
Hazama: I suppose I should expect this from an incomplete Black Beast... You sure look like a monster, but I guess there's still a brain rattling around in there.Arakune:
The Az ...Yes... I am... self... To ome e Azure...
Hazama: Yes, yes, you're a failure pal. I get it. Still, not just any human could get this degree of transformation. I tip my hat to you. Restriction 666 released! Dimensional interference force field deployed!Arakune:
Az ... The Azure... ur zure... I don ow...
Hazama: Azure, huh? All right. Lemme show you the -true- power of the Azure! Code S.O.L.! Azure Grimoire, activate!Arakune
Devour, devour, devour, devour, devour! I ill de ur that Azure!
Terumi: Lets play a little, you unfinished little bastard!
Terumi: Well, that was fun... Real good warm-up. Thanks, pal.
Arakune: Guh... gugugugugugu...
Terumi: Well, I'd expect nothing less from an incomplete Black Beast... just as tenacious.
Arakune: I... I'm the... Black Beast?
Terumi: No no no no... What? Didn't you hear me? You're an incomplete copy! You're a good vessel, but if you can't summon the sword, you're just trash.
Arakune: ... Trash...? I am... trash?
Terumi: Yeah, that's right. You're trash, pal, TRASH! All you know is how to devour souls... Though, you're a helluva lot easier to deal with than the REAL deal.
Arakune: You... You... You...! Guhgugugu! The Azure that I want... is right there!
Terumi: All right, playtime's over. The Azure you want so bad is about to wake up!
Terumi: Now... Murakumo...activate! This world is nothing but lies! LIES!
Terumi: Lemme show you what I like to call the truth! The truth called "despair"! In the name of Susanno'o, I command you! Murakumo, AWAKEN!
Terumi: Behold the sword of the god-slayer, KUSANAGI!
Terumi: Let all that lies fall before your divine blade!
Terumi: Gaahahahaha! Finally, I've got the true successor to the Azure! Try and stop me NOW, Master Unit
A researcher of Sector Seven. For the sake of surpassing Kokonoe, he touched the Boundary; as a result, he lost his memories and was transformed into an amorphous creature that sought only the Azure. After that, the creature was captured by Relius Clover and modified into a puppet.
Arakune followed Relius around in Ikaruga before being ordered to infiltrate the NOL branch in the 6th Hierarchical City of Yabiko. When he did, he found Noel, who had subconsciously entered the Realm. Arakune assaulted her, but Ragna and Kagura Mutsuki broke down the door and Arakune was forced to fight the Black Knight. He lost and retreated, returning back to Relius, telling him about Noel and Ragna being in the Yabiko branch before being ordered to return to Hazama.
After Relius captured him in Kagutsuchi, Arakune was locked away in a laboratory where he was implemented with an Artificial Causality Phenomenon Weapon. Litchi also worked in this lab and would visit him when she had the time. Before long, Relius sent Arakune to the Ikaruga Region. He was then ordered to attack Bang and Bullet, luring them back to the Grave Marker of Bases. Relius planned to use Arakune as the base for a new Black Beast.
A researcher of magic with a body containing countless insects. Currently living in the sewers beneath Kagutsuchi. In order to maintain its existence, it requires a large amount of vitality, which it obtains through attacking humans and Kaka. Claiming itself as the "Azure Grimoire," he (?) senses the Azure and moves.
Transferred into the Embryo, Arakune strangely became one of the chosen. In the Kaka Village, he found Bullet and fought her until she managed to fend him off.  He later lurked in the sewers of Area 28 until he sensed a piece of the Azure and came across Ragna, whom he assaulted. However, Arakune then sensed Noel, who holds a piece of the true Azure, and stopped in order to hunt down the young woman instead. He attempted to devour her but was stopped by Ragna and was nearly killed by him before Litchi came to his rescue, allowing him some time to flee. 
He ran deeper into the sewers before being chased down by Litchi. When he smelled the scent of the Azure on her, he attacked. However, almost immediately he realized it would overpower him, knowing that the power of the Boundary that she channeled would consume him, and he stopped his attack and fled.  Like the other chosen, Arakune was transported to Ikaruga by Nine the Phantom who told him to kill Izanami to claim his piece of the Azure. Before hunting down Izanami, however, he was discovered by his former colleague Tager, whom he assaulted and forced to retreat.  He found Nu-13 much deeper in Ikaruga and attempted to attack her, but was repelled by Relius Clover, so he fled.  In a possibility created by Phenomenon Intervention, Ragna took Arakune's desire and devoured it. 
Later, Arakune was tracked down by Litchi, Tao, and Bang. He fought the three of them before swallowing Litchi, which allowed her to meet Roy, and then spitting her out again. Arakune desired to become a Black Beast through absorbing nearby seithr, but was stopped by Bang and eventually dissolved into seithr.  It is unknown if Arakune's data was backed up by Es, and he has not been seen since.
- BlazBlue: Calamity Trigger Official Site (JP), Arakune
- BlazBlue: Calamity Trigger - Part 2, Chapter 2 - Cross Fate
- BlazBlue: Continuum Shift Extend Official Site (JP), Arakune
- BlazBlue: Chrono Phantasma Official Site (JP), Arakune
- BlazBlue: Chrono Phantasma, Story Mode, Chrono Phantasma, Episode 8: Reunion
- BlazBlue: Chrono Phantasma, Story Mode, Chrono Phantasma, Episode 12: Uninvited Guest
- BlazBlue: Chrono Phantasma, Story Mode, Sector Seven, Episode 2: Unwavering Feelings
- BlazBlue: Chrono Phantasma, Story Mode, Sector Seven, Episode 9: The Beast
- BlazBlue: Central Fiction Consumer Edition Official Site (JP), Story - Arakune
- BlazBlue: Central Fiction, Story Mode, Episode 003, Chapter 016, Sub Scenario 1
- BlazBlue: Central Fiction, Story Mode, Episode 003, Chapter 020
- BlazBlue: Central Fiction, Story Mode, Episode 004, Chapter 025, Sub Scenario 1
- BlazBlue: Central Fiction, Story Mode, Episode 005, Chapter 038, Sub Scenario 2
- BlazBlue: Central Fiction, Story Mode, Episode 007, Chapter 051, Sub Scenario 1
- BlazBlue: Central Fiction, Story Mode, Episode 010, Chapter 077
- BlazBlue: Central Fiction, Story Mode, Episode 010, Chapter 080, Sub Scenario 2