Jormungandr (Zettai Bouei Leviathan)

Jörmungandr doesn't have any elemental magic abilities, but is by far the physically strongest girl of the trio, capable of lifting huge boulders by herself - likely through strength boosting magic and can transform into an earth-affinity dragon girl brandishing a huge axe. She was adopted along with her 3 younger sisters by a team of miners and they call each one of them their fathers.