She likes getting tattooed.

For whatever reason, going under the needle does something for her. Perhaps it is the positive reinforcement of her peer.group of the day, or perhaps it is the delusion that she is enhancing herself. I don't know..

At this point being tattooed is part of her identity. I would also guess she has terrible impulse control.

There is no sane or rational plan to her designs. This is not about any kind of outcome.