Ingrid is a character who first appeared in Capcom Fighting Evolution and was later reintroduced in Street Fighter Alpha 3 MAX. Despite her young, innocent appearance, she is actually very old, possibly immortal. She is the true owner of the Psycho Power which M. Bison harnesses, though it is not evil in nature as it resembles more Rose's Soul Power. She is after the Psycho Drive which Bison utilizes to draw Psycho Power, as she states that it belongs to her (how Bison got it is never explained).
In M.U.G.E.N, Ingrid has been made by various authors.
Ingrid is a 6-button character and the majority of her Hypers can be easily used, so even casual players can work out the majority of them. She is quite fast, which allows her to perform quick combos for otherwise weak normal attacks. Her Specials are both explosive and graceful, which allows for not only an extra boost of damage to a combo, but also keeps the screen alive with entertaining explosions.