About

(SPOILER ALERT)

Drosselmeyer is an eerie old man who once lived in Kinkan Town. Although he appeared before Ahiru to give her the pendant from which she draws her powers, she learns shortly afterward that Drosselmeyer had been dead for decades. The author of the Prince and the Raven, his ghost escaped into a 'loophole in time', from where he monitors the story. He's very enthusiastic about the quest to return Mytho's heart, but encourages Ahiru to follow her feelings for the Prince instead of outright giving her any answers.
When Fakir tries to earn his story-spinning powers, he is opposed by the Book Men, who divulge Drosselmeyer's past. Drosselmeyer could also rewrite reality, and so his stories were in high demand. His penchant for tragic endings soon caused chaos, and to stop him from destroying the town, the Book Men chopped off his hands. Before he died, Drosselmeyer used his own bloody stumps to write a final story, so that he could control Kinkan Town even in death. He is also Fakir's ancestor.
When Tutu finds out that Mytho's final five heart shards are keeping the Raven sealed away, Drosselmeyer pulls her into the story so he can convince her to give up the quest, and instead focus on making Mytho her own. He controls her like a puppet when she refuses, and although she escapes, he later goads her into trying to drown herself after Mytho chooses Rue as his princess. Drosselmeyer almost controls Fakir when he is changing the spell over the town, but Fakir defies him and sends him away.
In the final fight between the Prince and the Raven, Tutu's hope changes the intended ending of his story, and he momentarily wonders if someone else has been controlling him all this time. He then takes Uzura and leaves with her through the loophole in time, to begin a new story.