Jesper hid his abilities and his past even from his closest friends for quite some time, Kaz being the only one who really knew from the start. That is no doubt why he recruited him, but there was a part of him he hid. Being a Grisha was not a source of joy, not for him, until here, and even then it's not shared with everyone. It's hard for anyone to truly know someone else, in his opinion, but if they know enough, that counts.

With Wilhelm needing to hold the globe he lets him have his hand back, although he keeps an arm slung around his shoulders because he can. Jesper glances down at him when he catches the 'was' and 'could.' He pays close attention to people when they talk and reads through them. He knows what that means. No wonder he was feeling wistful about the globes.

"That sounds lovely. Everyone should have one of those if they're lucky." He hopes that even if the brother is lost, the things he'll remember about him will eventually be only the good parts. That's how he has been about Matthias and his mother lately. "We may not be blood, but that's been Inej for me."