man, bei dou would love to just sit and watch him torture people, he'd find it so much fun

Name of character? Akira Hayama
Murder or torture? Torture, but he can go really far if he wants to
What don't you want to happen? Just don't make him lose his arms or all fingers or his nose or tongue and we're all good. But ha can cause a lot of damage.
Handwave or threading it out? I love threading out torture but if you get too many threads, handwaving is fine.
Do you want any part of it to be broadcasted later? Sure.