Jill is a member of the Power Birds.
Upon first glance, this blue jay looks like it belongs in Pokemon Sequencing Events. After all, there are only three differences between Jill and normal blue jays (extra tufts of feathers on the face, twin tails, and a jewel on Jill's forehead). Upon further inspection of Jill's actions, she is actually is the Power Bird of Azelf. The jewel on Jill's forehead possesses intense psychic power. To let loose, Jill must use a lot of that power at once.
Jill has a strange name that is not connected to the Pokemon she lets loose into.