You shouldn't think that one day, Vilmar would be the observant one between the three of them - Björn definitely wouldn't have thought it, which just feeds into him having no clue what is going on. Maybe there is something with Ari that Sig wants an outsiders perspective on, or... no, he can't really think of anything - if he needed to have something translated from Finnish, he could better have contacted Timo, because while they both speak it it is Timo's first language and for Björn it is only his a-close-second language.

"Hej." He'll sit down and make quick eye contact with the waiter to flag them down before going back to looking at the other boy, waiting quietly for an explanation to the sudden call.