May was one of Ash's former travelling companions who accompanied Ash through the Hoenn region. She was voiced by Krysdolly.
In "Time Flies", after hearing about May, Dawn demanded that Ash told her about who May was. In a flashback, Ash was talking to May about how she won't make love to him. This caused May to tell her that her Mother taught her to have safe sex. This prompted Ash to ask who her Mother was. May replies with a story about the time her mother gave her the "birds and bees" talk.
Time Flies (Flashback)