What type of dragons is lump and grump?

Lump and Grump are two dragon characters from the children's book series "Lump and Grump" by author and illustrator, Mary Lyn Ray. They are depicted as friendly, whimsical dragons who embody different personalities: Lump is cheerful and optimistic, while Grump is more grumpy and skeptical. Their adventures highlight themes of friendship and acceptance of differences.