A strong oni, and one of the Big Four of the Mountain.
Has a penchant for drinking, and usually seen drunk.
Has the ability to control density.
She is known to have existed before the erecting of the Great Hakurei Barrier in 1885, as the Big Four ruled the Youkai Mountain before the Barrier was made. Thus, she is at least 100 years old (because WBaWC takes place in the summer of 2019). So, in conclusion officer, yes she was old enough.