Moe Academy: The Darkest Space

The Star of Wisdom falls into Dark Files X and meets a mysterious young girl from the Quark Tribe.

Secrets buried for a hundred years are unearthed, and disaster strikes the Quark Tribe. The appearance of the Holy Seal brings a turning point. The Holy Seal Bearer, Princess Naya, and the Knights of Energy fight the forces of darkness to the very end, driven by a spirit of healing and fearlessness in the face of sacrifice.

A growing Star of Wisdom × a mischievous, spirited Holy Seal Bearer

Happy ending

I'm not good at writing synopses. (Mysterious Emperor is not a pairing; other pairings undecided. Wukena will not disappear. There are lots of original settings, all in service of the original story. Seasons five and six will be heavily rewritten later, and Tong En may not appear.)