Tetsuya Takahashi (高橋哲哉) is a game producer who worked on the battle graphics for Final Fantasy IV.
It is possible to kill him by casting Poison and waiting, as most other attacks only deal one point of damage unless the player casts Toad on him. He likes to kill the party members, dealing 9999 damage per hit. As the player might end up wasting MP on Raise or using a Phoenix Downs, it may be best to flee from him. When defeated, he will drop a Phoenix Down. After successfully beating him, he will not show up in the Bestiary.