Katsura

カツラ

Blaine was a former member of Team Rocket, having joined due to his interest in science and conducting experiments on some of Red's future Pokémon, specifically Gyarados and Eevee. However, after learning of Red's clashes with Team Rocket, such as protecting Mew from them, Blaine left the organization, attempting to atone for his evil deeds. When Red arrived at Cinnabar Island, Blaine was under attack by members of Team Rocket and their newly captured Moltres, which was on loan from Sabrina.
Blaine had his Rapidash carry Red to his Pokémon Lab. In return, Red allowed Blaine to use his Gyarados to hold off Moltres, during which time Red was able to revive an Aerodactyl from a fossil. Aerodactyl helped rescue Blaine and defeat Moltres.
Later, Blaine asked Red to help him in Cerulean Cave. While working under Team Rocket, Blaine had combined some of Mew's DNA with his own to create a hybrid Pokémon named Mewtwo. Some of Blaine's hand was infected with Mewtwo's DNA, allowing him to track the synthetic Pokémon. Because of this, Team Rocket attempted to abduct Blaine to determine Mewtwo's whereabouts. Using the Master Ball, Red was able to capture Mewtwo for Blaine.
The psychic bond between Mewtwo and Blaine limited them both. If they were apart for too long, both would begin to become ill. Blaine worked for several years trying to find a way to sever the bond without hurting either of them.
During the Cerise Island incident, Sabrina's Spoons of Destiny paired Blaine and Yellow together in the fight against the Elite Four. Together, they confronted Lance. However, the bond between Mewtwo and Blaine proved to be their undoing, and they were defeated, leaving Yellow to face Lance alone.
Later, during the Mask of Ice's plot in Johto, Entei chose Blaine to be its partner. The healing power of Entei's flames was finally able to cut the link between Mewtwo and Blaine, and the two were free to live their lives apart from each other.
Although he is serious in most situations, he also had his comical moments, such as getting his moustache burnt while training and having to use fake ones. Sometimes he may also use riddles to lighten up a dark atmosphere.