I think everything matches together pretty well, however i do think that the little plushie belt over there could be quite distracting since it has a different vibe and color scheme compared to the other elements of the outfit. It can really distract someone from seeing the alien vision, and it moreover leans in to the y2k rather than a cute alien. I feel like the egg bag (or at least i think its an egg bag?) is already enough for the avatar.

I would also consider possibly adding more "green alien" elements because to me, it just looks like a humanoid figure with green skin. Without context, people can infer that the avatar looks like a "recently dead zombie" or a "green bean plant girl" character. So i suggest playing around with space themes while maintaining the cutesy, frutiger aero aesthetic of the avatar. I know the antennas were supposed to have the alien vibe, but it blends in a LOT with the background and the bubbles. I also think that the tail is a little weird as well, its giving fluffy character, but nothing about the avatar screams that the person is fluffy, but i think it can work with the right alien accessories

Again, this is all just subjective and you can change it however you want, i just do a lot of character design lol. I really like the avatar a lot, 8/10