Unmarked spoilers are ahead, per Spoilers Off rule.
Ryo Ogino is walking, talking nightmare fuel on two legs. Unlike the lead characters who kill for monetary gain, not only does he enjoy killing, but he makes it a habit to record his victims' last words. He is introduced completely massacring the kingpin's bodyguards and later is revealed as being responsible for much of the conflict in the story. Worse is he now knows about Miri and why Kazuki and Rei were getting sloppy. Even his death, however karmic, is graphic and indiscrete, as audiences have to watch a kitchen knife get jammed into the back of his neck, before he falls onto it so the knife gets pushed out through his throat, leaving him to lie twitching on the ground, gurgling and bleeding out. Getting incinerated by the following gas explosion thankfully finishes him off right away.
Kyu is forced to contact Miri's mother because, since Shigeki and the organization are aware of her existence, there is no guarantee that they could afford to keep her alive. It’s all for naught as Shigeki sends Ogino to kill Miri and her mother anyway in order to remove anything that could deter Rei from inheriting control of the Suwa Clan.
