[It's further scrutiny, and a little disdain at the reaction and wavering tone to their response. Heine isn't sure what to make of it, as Crona right now is coming across as someone who might be easily taken over by whatever entity resides in their brain. Conceptualizing it as separate souls doesn't cross his mind, a little too far out of his own experience.]

Used to it doesn't mean you're in control.

[His voice doesn't soften so much as just become a little less terse. He doesn't approach, keeping his distance and giving them an opening to run if desired; he's aware he's kind of off-putting, to put it mildly. Not good at this kind of thing, commiseration, his comments are still direct and to the point, and his attempt at reassurance is stated too perfunctorily.]

I'm not gonna hurt you. So, what happens if you lose it? Mine's gonna kill people.

[Really, he's just looking out for the populace here, under the assumption there's another person like him around, which is never good.]