[Kratos had forgotten what it felt like, to be able to call out in the silence of his own mind and know that someone would still answer. It's reassuring in a way he hadn't been able to remember, even with Yuan's edge of exasperation. Kratos's wordless response is an edge of amusement, gratitude, that quiet nostalgia of I missed this. I missed you. which could only be said silently.

[He doesn't exactly sleep. With a wound like this, he can't afford to turn off his angelic fortitude enough to do so. But Kratos drifts a little, until Yuan speaks, and orients his mana-sense inward without stirring.]

Yes; healing artes speed natural healing using the body's own mana. Since yours is dominant, the healing turns it into mine through the healing process. It's working as a conversion filter, of sorts.