Mingchao is an orphaned Chinese girl who lives by herself in the Old West. Her grandfather is the one who created the Eto Gun, which she can fire due to the number XII branded into her palm. Mingchao has a kind, carefree personality, yet can show outstanding courage when her friends are in danger. She refuses to kill, and often stops others from killing their enemies, no matter how bad they are. She is very forgiving, even allowing Alternate, a former enemy, to join the group. Her demeanor makes her likeable to others, and she builds friendships easily. She shares a special bond with Baskerville (or, as she calls him, "Mr. Priest"), and appears to have romantic feeling towards him despite the age gap. However, their relationship could also be closer to that of a father/daughter one, or possibly that of a brother/sister.

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