Kira

History
While her parents aren't revealed, Kira is the niece of Shang-Tsei and an assassin trained by the Dragon Clan. She first appeared in the "Coronation Day" story arc, where she is tasked by her uncle to assassinate Marcus and Leana who are about to be crowned into King and Queen of Camelot. She of course fails, and from then decides that she will do anything in her power to impress her uncle.

Through the second season, she is seen operating on her own missions, outside of her uncles' orders, to taking initiative and proving her uncle that she is worthy of succeeding him as Dragonlord. When Shang-Tsei is sent to the Void Dimension in "Escape From the Void", a contest to decide the next Dragonlord is made. Kira participates and, against all odds, wins, making her the new Dragonlord.

Kira only uses her power as Dragonlord during the two TV movies that followed the TV series, proving that she isn't only worthy of being Dragonlord, but that is is way better at it than her uncle ever was.