It seems to me that the "modern /jp/ poster" seems to know quite little about the Galaxy Angel Series
So I will educate them

Galaxy Angel, or Project G.A. is an early 2000's 2D Space Opera series that encompasses many forms of media. It's main cast and unifier is the Galaxy Angels, also known as the Moon Angel Wing or Angel-tai.

It is a large, multi-media series consisting of
- Over 3 Visual Novels with Real-Time Tactics gameplay (PC, PS2, Xbox)
- 4+ anime seasons and OVAs
- Manga
- Pachinko series
- Spinoff games for the Gameboy Advance, PC, & PS2
- Character Drama CDs
- Multiple music CDs/Albums
- Radio Broadcasts & Information shows
- Crossovers with Di Gi Charat
- Merchandise
- Even a Musical on Ice

The series was made by Broccoli, also known for their hit otaku series "Di Gi Charat" and their GAMERS otaku merchandise stores over Japan. It's a very 2000s Akihabara vibe.
While it may seem like an older series, Broccoli has still surprisingly sold new merchandise on their website seemingly even into the 2020s.
If you like Milky Holmes or Teekyu! I think you will like the anime and the Visual Novel is a fun and immersive space tactical strategy game in itself.

The visual novels have full english patches and you can easily watch the anime on DVD/BR or mainstream streaming services, so I hope you check it out!