Veldora Tempest

Height: 210 cm (human form), 100 m (dragon form)
Species: True Dragon
Blessing / Divine Protection: Storm Dragon's Grace, Demon Lord's Ally
Disaster Rank: Catastrophe

Veldora Tempest is the youngest of the four strongest dragons (True Dragons). He is connected with Rimuru by an agreement and was known to rampage here and there. He was the one to name Rimuru and Rimuru gave him his last name, since they share the same last name, Rimuru could technically be classified as Veldora's adoptive brother.