Hes good with strategies, planning, he's intelligent, manipulative, abusive, is cruel and merciless, controlling, unfazed by most things. However his cruelty is not for cruelty sake. He always weighs the pros and cons of his decision. He leaves a bloodstained path and have hurt and traumatized countless other people like Yosano and Dazai being prime victims of his abuse while they were still kids. Mori never takes emotions into account, only logic and strategy. Likes kids and manipulating them.