And none of that matters if they are pandering to their popular status as you can say the same for Marie(which I know you would).
They are taking full advantage of their popularity and it would have been the same if it was Nyotengu or Mila.
Except Nyotengu didn't make it in nor Mila (what? Mila?) anyways, which further bolsters indication that even the devs are falling to an indoctrination cycle trend to force people to like those characters. (Mila? that would increase Argentus's crazy fetish of picking the game up just for that reason.)
Regardless, those character do not by logic count as true stars because they only appeared in one game and that's DOA (so did Nyotengu, but the character has properties from another and just a overall better personification as a whole), it's a contraction in reverse. When you add stars, you add representatives to back those games up or are you quite gullible and naive to fall for silly trends?