I have a question about the "rubicund...". I haven't played this game for a while, but from what I remember, the Invincible is pretty much red&black themed, in particular the interior. Also, during the scene where it wtfpwns Alexandria, the "eye" is clearly red, and the beam it sends is pink/purple-ish. So yeah, the question is, is that the rubicund you're talking about? In which case it means the character we're looking for was at that point in the city, but survived the blast (but got wounded?).