WAIT A MINUTE
We all know Luka is Juleka’s brother and he’s going to gain Mari’s attention in some way. So Luka and Mari are probably going to same a common interest. Could it be fashion? Possibly, art classes are going to be shown in the season so that’s where they might meet but there’s another possibility.
Juleka, in her concept art, used to be a goth/punk rocker.
[right next to Rose on the far right]
Let’s say Luka is going to inherit some of Juleka’s conceptual traits. Who else in the show is connected to rock music? Jagged Stone.
Luka and Marinette are going to bond over being fans of Jagged Stone. Maybe Luka heard about Mari being close with Jagged and wanted to get know her.