Calcifer

"Howl: You didn't have to come back, Calcifer."

"Calcifer: I kinda missed you guys... and it looks like it's gonna rain."

Calcifer is a fire demon in ''Howl's Moving Castle. ''Calcifer is voiced by Tatsuya Gashuin in Japanese

Personality
He's rather unfriendly towards Sophie at the start of the movie, but grows to like her, since she put logs closer to his reach and seemed to be able to keep Howl in line for a bit. He also made a bargain with Sophie that he would try and break her curse, if she would break his, but he could only give her hints.