Madoka Kaname asked about Final Iroha

Madoka: Okay, this is my explanation. Looking from my perspective, Final Iroha (Tamaki Iroha) is a good person, a friendly girl and never had any problems at all. But what Rettsuma did was an unethical act and like a brat whose hobby is stealing what other people have. The only thing that makes it very surprising is that Rettsuma does not have a human brain, but instead slaughters Tamaki Iroha so sadistically without mercy, I see.