Hikaru Shindo - hikaru_shodan (maintained by umeko_pyon)
Akira Touya - akira_touya (maintained by demonyohko)
Fujiwara no Sai (claimed by witchlamia)
Yoshitaka Waya (claimed by witchlamia)
And so that everyone knows, witchlamia is only taking one character, so far that I know. She just has to decide which one she wants to play - we're taking some time to consider plotholes and the like.