Since Shima was brought up, I had this question for a while. Do you think, aside Suguro and Koneko, Shima considers somehow Rin a friend too?
Cause if you think about it, in the middle of all this mess, Shima's one of the few characters with the most large amount of informations regarding Yukio (plus, he's the only one who actually saw with his own eyes what he's going through) but he acts like he gives two shets about Yukio and his problems (and that's okay, THEY're not friends and there's no doubt about it) but, if Shima considers -Rin- a friend, even just a lil, yeah, I understand he's doing everything for the sake of the mission and he probably really cares for his own life that much, but do you think he feels a lil guilty for knowing about Yukio (and it looks like he knows more than we think, "Is that Satan's power?" hinting he does indeed know what's really going on with Yukio) but keeping all the infos from his brother? I mean, we know Shima is not that heartless when it comes to his friends.
When Yukio threatened Suguro, Shima showed up to warn him not to involve him anymore or when Izumo tried to escape, he pretended to kill Uke and Mike. So HE does let his feelings out (even if behind the curtains) when they're friends are in trouble. I'm not saying Shima should've told everything to Rin, but, I don't know, even just give him a small subtle hint (in secret, obviously). But I guess I already answered my own question myself, hehe.
Edit: I'm gonna go against what I just said but, another random question, in chapter 93 do you think Shima was 100% sure that if Yukio pulled that trigger, Satan would have showed up and saved him? I mean, Shima's been observing Yukio's experiments from the beginning. We know that when Yukio tried to kill himself in chapter 93 he was sure he was gonna succeed because he believed the eyes' trigger was the "fear" of the death and not the risk itself. So, since he was willingly accepting the death at the time, he was sure the eyes' power wouldn't activate.
I'm guessing Shima should've thought the same if he didn't have a clue about what Yukio's -real- eyes' power is. But when Yukio pulled the trigger, Shima didn't intervene to stop him. So, either he did know the eyes' power would protect him this time too, or he's really that heartless but, I don't think so. Shima needs to bring Yukio to the Illuminati, so why risk to let him die? Argh... I want to know what Shima actually knows!