Palm

Palm's name is mentioned in The Brightest Night as Smolder's lover, yet he said that his mother did not allow it for the fear of more challengers and Smolder never saw her again.

The Hidden Kingdom

When Glory and Jambu disguised themselves to enter Blaze's Fortress, it was explained to them that one of the tapestries was a romantic story of Blaze's brother falling in love with a dragon and that her mother never approved and thought that Queen Oasis might have killed her. It may have been possible that the same dragon in the tapestry may have been Palm, Smolder's love.

The Brightest Night

Smolder, near the end of the book, says the name of his lover to be Palm. He recounts a similar story to Blaze's one that may have been possible to be Palm.