I have no idea what your timeline is for potentially apping him, but if he arrives while the Barge is in port Tris is going to demand to go flying pretty much immediately. Otherwise, the next port they make. Flying.
she'll just have to drag him off the ship immediately the first time they get to a port after his return. In the meantime, he can keep her company when she goes hang gliding in the Enclosure. Come jump off cliffs with your sister. A family bonding activity.
one of my very favorite Taura scenes is the one where she's been so patient and gentle with a bunch of traumatized girls that they hide behind her when other people approach, despite Taura looking about 10 times scarier than anyone else in the room.
(I also like the fact that Taura, in uniform, ties a ridiculous pink bow around her neck because she's trying to make herself look less intimidating to children. The viewpoint character is just like, "uuuuuuh. I don't think that will make a dent, but good effort")