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- "Grandfather! Stop messing around!" 
Sun Daiyu is the granddaughter of Dr. Sun, and the identical twin sister of Sun Mingmei, one of the students on Castle Wulfenbach. It is unknown if Daiyu had also spent time as a student there. Daiyu was first seen bringing Captain Vole to see her grandfather after he had retrieved the head of General Selnikov.
Daiyu’s sparkiness has not been established.
Behind the scenesEdit
Daiyu was born of a ‘minor mistake’ by Professors P Foglio and K Foglio. Daiyu was supposed to be her sister Mingmei, but they forgot that they had given her a name on the cast page. After some thought, and a poll of the Live Journal readers, it was decided that Daiyu would be Mingmei’s previously unknown twin sister. Evidently, the name Daiyu comes from that of a character in the classic Chinese novel Dream of the Red Chamber.