Percy + validating and supporting his friends
Keyleth's worries about being worthy? He reassures her and reminds her she's capable in a moment of crisis. Vex's insecurity about being rejected by her home/father and not fitting in with nobles? He defends her to her invalidating father by conferring a noble title on her from Whitestone, essentially welcoming her into his home even as she's been rejected from hers.
He understands that Vax's grief over dying and the reality of the situation is undeniable so he doesn't try to smooth it over with words, but he offers Vax comfort by silently going to hug him.
And when he sees Tary struggling to stay calm, he uses Tary's love of narrative to ease his nerves in a tense situation.
Bonus for Cassandra who shares his reserved disposition, traumatic history, survivor's guilt. They are each other's only remaining family, and he knows how strong she had to be to face the Briarwoods everyday. He knows they have the will and the love to survive, the love they have for each other and for Whitestone. And he offers her that reassurance.