Oh wow this is really pretty! Definitely keeping an extra but it looks like I still missed both splits today. I'm not very good constellations because this sort of resembles Aquila or Capricorn. Then again the book I'm referencing from has a slightly different image from the artist. I'm going with Aquila cause the serval has wings and does not look any more like a sea goat aside from the tail that all servals have.
Is this yours Commander Shepard? It is one of the more recognizable constellations. A small part of me leans toward Mira from the spring phoenix clue. And the newborn looks more like their usual style.
Or both of you could be in on it and this still growing one
is Mira's or vice versa. Just have to wait and see if that one also has a constellation and/or wings. Cygnus is a strong candidate as the theme as well. Even if I'm totally wrong I still love the serval and it's really hard to pick a favorite. Looking forward to more surprises!