Guardian of Guardian Dragons

Elipso is a late bloomer who hasn't yet received a dragon guardian, which makes them a target of bullying in school. They dream of becoming the Guardian of Dragon's Guardian, and one day while at the dragon statues, they touch the foot of the royalty dragon and pass out. Upon waking up, they find themselves on a throne, surrounded by all four dragon species. The royalty dragon asks if they're willing to give up their life to protect other dragons, and they agree, becoming the Guardian of Dragon's Guardian and earning the title of Queen Elipso.