I love this picture on so many levels. It really reflects their relationship by the end of the current arc so well. Arisa, the small and timid friend, has become the savior who dragged Losaria back from Nexus control and is now standing taller than her. But she couldn't have done it without the assistance of all those at her side (represented by the stool).
Or maybe this is just a height joke. Either way these two are gay and I will not accept it if Cygames decides to split them up in their next appearance.