He was a human from the same race as Rudian. His strength was close to Rudian's but slightly weaker than Rudian's. However, Ruar could move faster, and he had faced Ruby's race before. Ruar was also Ruby's disciple, so he had quite a lot of abilities. His race also had a time limit for expanding their bodies, which was different from Ruby's race. The more they were injured, the shorter their time in giant form would be. Ruar was also the deputy leader of Rudian's star beetle exploration unit.