Ryuga

Ryuga (リュウガ) is a character in Hokuto Musou. He is Yuria's older biological brother and Jyuza's younger brother. He is born under the Sirius Star, which is considered the "lone wolf" of the heavens with its bright shine.

To test Kenshiro's worthiness as the "messiah of the end of the century", Ryuga allies himself Raoh and becomes one of his cold-hearted subordinates. Committing several horrendous acts as his general and attacking the heavily ailed Toki, his actions ignite Kenshiro's anger in a final confrontation.

Fighting Style
Taizan Tenrōken has the user's victims feel a sudden chill before dying to the user's quick, slicing punches. Ryuga imitates several wolf-like poses while performing his attacks. It seems to be Nanto inspired, but it's never associated with the particular school.