He was the only male I used in ABOW, so I guess that counts for… something. Most of his cards were just glass cannon.
As far as I know we don’t have much information about Takeyama beyond his simple character gimmick of nobody calling him Christ. He’s another generic hacker who can recite a lot of pi for some ungodly reason. We know that he takes great pride in his online tag, and after he loses his computer skill he feels unworthy of being called Christ. I haven’t read any of his Heaven’s Door stuff yet, but apparently he doesn’t do much there either.
As for my thoughts about Kanade Takeyama? Well, I don’t have anything to say that others haven’t. She He, like most of the Angel Beats cast, has a lot of untapped potential™ and is just dying to have more time to herself himself. You’d need to make something like, I dunno, a visual novel route dedicated to her him to even have the time to do her him justice.
So here’s my verdict on her his character:
Angel Beats!: Exists
Heaven’s Door: Hardly exists
xth Beat: Hype/10