Warhammer 40K: the Great Library That Had to Be Moved

"Touhou Project + Warhammer 40k" It was just an ordinary day. The Qiyao magician Patchouli Noreki from the Immovable Great Library was about to ask a certain black and white mouse to return a book. She thought about using a teleportation spell in a strange ancient book, but unexpectedly, she came to this completely different world and met a group of blood-red noble angels. The think tank of the Space Marines couldn't figure it out. Although they couldn't find any psychic reaction, the purple-haired girl in front of them could release all kinds of spells. (Set up your own battle group and try to restore the original work without OOC. The author will take the initiative to check the information. If you have any questions, please point them out. Please feel free to comment.)