Random Touhou Headcanon 7 of X
This one is going to be a bit more serious, so be aware.
Yuuka always calls Reimu "Reimu-chan". The reason why, is the serious part.
Yuuka was in close ties with both Mukoshi (夢枯死) Hakurei, Reimu's mother and the previous Hakurei Shrine Maiden, and Makerubou (負ける夢), her father, being taunting and teasing, yet also getting the two to realize the romance that sprung up between them. Though, when Mukoshi was killed trying to exorcise a vampire, Makerubou couldn't take the grief and went back to the outside world to focus on his flower shop and trying to prepare for taking in his daughter. Seeing all this go down caused Yuuka to appoint herself as Reimu's stepmother and continue raising her as a shrine maiden. When she had decided on the Spell Card Rules, Yuuka felt it was safe to leave Reimu to fend for her own.










