we'll have a yuji pov so i don't want to spoil much, but!! i'll answer in the view of a hypothetical what if where someone DID kill ryo as a kid...i know it's a divisive idea, but safe to say he'll go on a rampage, i think. think of it as losing your one last thread of sanity. the failure to protect him regardless of how powerful you are...what's the point of everything? i think it's ironically the last straw into descending into madness, especially because ryo is just ryo growing up. as a friend says, he's just so...boy. how would you feel seeing something so innocent and precious to you be killed for a past life before he could even grow into his own self? you're the strongest, the only one who wields this power, yet you can't keep him safe? :(