Shōga

History
Shoga (生姜，しょうが) is the old female flea betrothed to Myoga by their parents. She appears in the episode, "Farewell To the Days of My Youth", in which the situation is explained. Apparantely, Shoga chases her unwilling fiancee across Japan, determined to put an end to his womanizing ways and force the marriage herself. Shoga, unlike Myoga, is able to possess both demons and humans, forcing them to act in any way she sees fit. Myoga himself can control birds and other small animal, but only to an extent.In her first and final appearance, Shoga possesses first Sango, then Miroku, intent on using them to catch Myoga. When Sango attacks Miroku, at first they believe she is sleepwalking, but then realize she was possessed. The group believe it is the influence of a monster centipede, who they slew earlier.

When InuYasha is possessed, Shoga goes after Shippo, on whom Myoga hides. At first Inuyasha starts hopping like a flea, then calls Myoga's name.

After catching him, Kagome sits InuYasha, bringing him back to his senses. They hear Shoga out, and decide to punish Myoga for his silence by agreeing to force him to a traditional Shinto marriage ceremony. When the wedding comes around, however, they are all sorely disappointed. Leaving a common flea in his place, Myoga escapes. Hot on his trail, Shoga begins her hunt all over again.

Character Description: Shoga the Flea
Shoga appears in the episode "Farewell To The Days of My Youth". She's furiofor at yoga for running off on her all the time. Unlike Myoga, she can actually possess people and demons in order to catch him. When she possesses, the results are both scary and hilarious.