"I'm fine," he replies quickly, meeting Eiji's gaze again. And then he pauses for a second. He doesn't usually bother trying to explain to people. Mostly he's fine with keeping to himself and letting the few people who have had enough contact with him to see the personalities switch just decide he's weird. But Eiji seems genuinely concerned and... well, Tomoki understood, didn't he?

"There are a few of us that share this body."