Suien is a high-ranking, female ninja of the Genma Clan.
She seems to be rather tall for a woman, has long, dark hair and large breasts. She wears rather skimpy ninja armor. Her right eye is covered with an eye patch. She carries a sword and wears a magatama on a sting around her neck.
Suien is usually seen at Waka's side, giving him advice. She tends to be more on the cautious side and appears to be rather strict with her underlings. Despite Waka's praise for Kagari she remains skeptical of the girl's skills.