The context for this picture is that they're all drawn by the same artist. The women in the back are from Girls Frontline while Saga, the one sitting in front, was recently added to Arknights. Hence they're all "welcoming" her.
^Crossette admires Pyra in the way most Japanese media has young women admire one another. Very gayly. Also, I think Crossette was unlocked with DLC and you didn't have to actually roll for her, like with Poppibuster and Corvin.
Morrigan should have been a bi-romance. As many flaws as DA2 has, I'm glad they decided not to restrict the romance to two straights and two bi's like they did with Origins.
@Serenata As for Honkai - not anymore. After Bronya x Seele "incident", almost everything was toned down. Since that time I think I never saw them addressing each other in a different way than "sister". As for "main" pair Kiana and Mei, since APHO is probably canon, we shouldn't have our hopes high.