A lot of things to say with this picture.
March is laughing and he's totally adorable. He cuts his bang so now he looks like in the manga.
Ifrit has been promoted from background character to important secondary characters, at the same level than Robin, Dali, March and Buer since he's with them (while Orias, Murmur and Ipos who were importants/presents (well especially Orias) in saison 2 and 3 aren't here).
So maybe the anime will give our fire demon some extra scenes to introduce him. Last season, his design was fixed, now he'll get some importance. It would not be hard to give him his flaming tail, for exemple. Some hints. Some joke about his job of being the security guard.
It could also implies that the Dorm Tour Chapter will be in that Season since Ifrit has some little role in this chapter. (We'll also see Robin being the snack police with Orias then) and so that season 4 will end Iruma's first year at Babyls.
Also It's only me or it's look like if Eito laughs with March? He seems turned in his direction, unlike Robin who looks at the viewer, and Dali who seems to speak to Robin. Does it implies they're friends?
Also, the Mafia AU first season will likely come out before the season 5 of the principal serie (where the HeartBreaker Arc will probably be). They need to introduce Ifrit BEFORE the "Mafia AU anime" get diffused on 2027.