Jacob does Evie’s braids. All of them. Like he knows how to do the fishtail, the crown-like one she uses, a simple braid, waterfall, ladder, the French, the Dutch, the twist, etc..
Like he is in charge of that. And they always talk about their mission objectives while they are doing that.
Or when they were kids, both protected each other. Evie cuts her hair short like Jacobs when she is little and wears his little man clothes. Then make the other kids tell them which twin are they.
He tells one of his Rooks to dress up as the slutty prostitute instead of Evie because she felt uncomfortable.
THEY SLEEP WITH STUFFED ANIMALS.