Shameless plug that if this doesn't work out, I'm in a game with a tiny KHR cast, SO.... U KNO....

But really, for this, I think it'd be interesting if these two had a decent relationship Pre-Awakening in contrast to the mildly antagonistic/nonexistent one in canon. Chikusa will even be a regular nerd with good grades and a normal family that he may or may not be living away from before he remembers all the fucked up things.