Thirteen years before the Embryo Incident, Ripper was a sadistic serial killer. He was captured by the police and was being transported. Suddenly, Ripper developed his Drive and killed all but one of the police guarding him and escaped the van. He then broke into Yuki Himezuru's house and killed her parents. As he was about to kill Yuki, Kazuto Kotetsu, the one cop who survived, arrived and shot him, saving Yuki. However, Ripper survived the bullet wound and managed to escape.
Code: Embryo, Lost: Memories
Ripper was first seen digging through the corpse of a Union until he found their crystal and ate it. 
Two days laterm, he broke Drei's barrier and brutally killed Akio Osafune, eating his crystal. Realizing Ripper was in phase zero, Drei requested that he “release the Grimoire.” Ripper refused to do so unless it was interesting and called out to speak to Sechs instead of Drei.
The next night, Ripper attacked Touya Kagari, Es and Mei Amanohokosaka. After throwing a knife and a smoke bomb, he appeared behind Touya, asking about the Grimoire but was knocked away by Es. He was pursued by Es, who followed him into a building. He threw a Molotov Cocktail at her but was interrupted by Avenge. Once Touya and Mei arrived Ripper decided it had gotten boring and escaped. 
The evening after Akira Kamewari ripped his crystal out of his body, Ripper kidnapped Hinata, knocking her unconscious and chaining her over the edge of a roof. He then called Touya with Hinata's phone and told him about it. Touya asked if this had something to do with the Grimoire but Ripper said he forgot he was asked about that, only doing this because he found Touya interesting. Ripper told Touya he had to find them before sundown or he'd kill Hinata and hung up. After Touya ran into Kuon, he received another call from Ripper, who said he was tired of waiting and activated his Drive so Touya could follow the Discover Call to him. With the help of Kuon's magic, Touya reached Ripper and Hinata. Touya begged Ripper to let Hinata go but Ripper just made fun of him. Ripper told Touya that he had a strange “odor” similar to his own and Sechs's and he wanted to find out why that was for fun. In order to make Touya unleash his power, Ripper told him that he was the one who murdered Yuki's parents. When that didn't work Ripper cut the chain holding Hinata, leaving her to fall to her death. Touya went berserk, unleashing the power of the Origin of the Grimoire, which stole the seithr from Ripper's body, causing him to run off saying it was not fun anymore. A heavily weakened Ripper escaped to the sewers, where he was found by Avenge, who attacked him. Ripper claimed that he surrendered but tried to attack Avenge when he approached. However, Avenge saw this coming and countered his attack before killing Ripper. 
After his death, Ripper's corpse was taken by the Magic Guild where it was experimented on. Ripper's soul somehow ended up inside of his Brain Cat doll. Eventually, his corpse was resurrected and developed a soul of its own that became known as Kiri. Ripper was eventually able to develop the ability to take over his old body. When he did, Ripper murdered the entirety of the Magic Guild's leaders and began to hunt down Touya. He knew that Touya, after using XBlaze, had managed to store most of his old power.
At this point, Ripper was designated by the Guild as Freaks, a moniker he liked so much that he decided to use it. Kiri was, however, completely hapless and nothing like Freaks. Freaks manipulated Kiri by communicating through Brain Cat and telling him that Touya was the leader of some bad guys that needed defeating. Every now and then, Freaks would take over from Kiri's body, murdering other Unions in combat and eating their crystals.
Kiri finally encountered Touya. Freaks briefly took over Kiri's body and bit down hard into Touya's neck. He began to drain the seithr from Touya's body, regaining his power, but he was shoved away by Es. With this power, Freaks was finally able to take his body back and began to fight against both Es and Touya at the same time. He explained how he was resurrected and that he was ready to take back all the power that was taken from him.
Freaks clashed his blades against Touya multiple times until they were interrupted by Mei. Freaks had already left Touya decorated in injuries before he turned his attention to Mei. He effortlessly cut through her spells and continued his assault until she was knocked unconscious. Both Kuon and Elise then arrived; thoroughly annoyed at this point, Freaks attacked both of them, but was hit by two separate casts of the powerful spell Soul Direction. The mages described their teamwork as invincible, leading Freaks to activate the New Testament Grimoire, a power he had attained that allowed him to activate XBlaze. Freaks began to taunt them as he was draining their life-force. Es then grabbed the Murakumo from Touya's side and used it to fight Freaks. She activated her own XBlaze and knocked Freaks out of using his own.
Mei had regained consciousness. Elise, Kuon, and Mei bombarded Freaks with spells until he activated XBlaze again. This time, however, Touya jumped from above and slashed him with a blade of blood. The two clashed swords again until Es blindsided Freaks with the Murakumo and slashed at his left eye, his crystal. With this finishing blow, Freaks was finally killed, and his body was returned to Kiri.
- XBlaze Code: Embryo, Episode 1
- XBlaze Code: Embryo, Episode 4
- XBlaze Code: Embryo, Es & Hinata Route Episode 8
- XBlaze Lost: Memories, Chapter 18A – A Boy and His Cat
- XBlaze Lost: Memories, Chapter 20A – To Tempt the Azure Fate I
- XBlaze Lost: Memories, Chapter 23 – World of Possibilities
|Other (C-series)||Edgar and Claire Vermillion ·Ellen Nelson · Four · Francis and Rosenne · Lao Jiu · Pakumen & Terumen · Three · Two|
|Remix Heart||Elina · Guardian ·|
|Variable Heart||Julian ·|
|Phase Shift||Ayame Yayoi ·|
|Crossover Characters (BBTAG)|
|Persona 4 Arena/
|Under Night In-Birth|