Efi and Torbjörn though.
Like, the dude has already a bazillion kids, and if you consider that Rein probably only visits on holidays/when he can spare the time and that Ana’s last contact with small children was about two decades ago, Torbjörn is really the only guy who has any idea how to act around a child.
He’s the one to tell D.Va (from a safe distance, mind you) that children of Efi’s age may be geniuses but they have yet to learn that intricate balance between ‘just enough sweets’ and ‘sugar high’ (some *cough* McCree *cough* never learn it) and that Mountain Dew is not a healthy choice for anyone, much less a pre-teen.
When Jack tries to live up to his Dad reputation Torbjörn runs interference and advises him to buy Efi a nerf gun first before he lets her use his rifle for target practice.
Ana tries to remember what Fareeha was like at that age and gifts Efi toys fit for a six year old instead because at some point you just forget kids aren’t all the same from age 1 to 12.
So at the end of that day it’s Torb and Efi sitting around a table, the latter making a memo to sign the team up for babysitting because people, this is shameful, and Efi wondering if she’s part of an elaborate prank or if those really are the people who save the world on a regular basis.
It’s alright, though, because Ana’s well-meaning but inappropriate gift features all the necessary parts for an impromptu engineering project and she may not yet possess the muscle tone to fire Jack’s rifle but he’s let her have one of his biotic fields (in the true nature of a man who will give a child anything they want as long as they go away and keep quiet) and she’s already in the process of reverse engineering it and Torbjörn is as great an engineer as she is so they’re bound to have some fun.