Arknights - Final Dawn

The worst possible enemies you can have, are those of unknown origins. After all, there is solace in the knowledge of your enemies, yet there are none in the unknown. (Doctor(OC) x Surtr x W, first-person view but changes to third-person view and characters might be a bit OOC)
*I don't own the cover image and this fic is also posted on fanfiction site with the same title*