The feeling has been persistent for months, itching at his skin, tearing through his heart, churning his stomach and clawing at his throat, making him nauseous. Hate. That's all he felt. Killing wouldn't cut it any longer, wouldn't purge the tormenting, draining, dreadful emotions. All for one would have a field day with his body once the war commences.
You've never tried to stop him, you aren't sure you want to, it was something unachievable anyways. But you've warned him. If all for one gets a hold of his body he gets a hold of everything, Tomura won't be allowed to do this his way, to scratch that itch, to carry out the wishes of his comrades. He's well aware at this point.
Something. something that he's been careless enough for you to catch glimpses of, Tenko Shimura wasn't truly gone. No matter how hard Shigaraki has tried to kill that part of him.
He'll always have a fragment of Tenko. Hopefully.
"I'm gonna be great...you're gonna be great, we're going to rip those smiles off of their self righteous faces". He has faith in you, he believes you understand the liberty of tearing the earth down, with him by your side. It aches, all over, he doesn't look like your leader, like the muse you've looked up to for so long now. No, this wasn't Tomura, this was All for one's successor, his body was ready and he's never felt more alive.
Poor Tenko, that part of him is probably drowning in a sea of sin and bloodlust, but he's still holding on. Tomura looks around when you don't respond, you stared at him like he was insane, he didn't like it. "This is it, our dreams, our goal, we'll crush them and rebuild this wretched society brick...by brick".