So, the photos are what the character's hair and eyes look like, so please disregard the fact that they may be from animes.

This is Hotaru Kamiya otherwise known as "Zerlic". She is the main character and she's short, but no younger than the others on this list.

This is Aiya Monat, or "Sylin" she the first character Hotaru meets and describes her as "beautiful"

Siren Dutan, "Celesta" appears much later than Aiya but she is dramatic when introduced, giving her a fun vibe.

Last but certainly not least, this is Rei Kurinie, also known as, "Reblase"

And that all I have so far, I'm going to upload another part and it's going to have their weapons and costumes.

(Careful, I may end up adding some more characters later, be on the lookout!)