Teresa, whose last name is unknown and is of Hawaiian descent like Lilo, is one of Mertle's friends and Lilo's rivals. She usually travels in a group with her leader Mertle and the other two girls, and seldom say anything other than a sarcastic "Yeah!" in unison with her friends when agreeing with whatever mean thing Mertle has just said about Lilo. It is often hinted that she and the other two girls would probably actually like Lilo if Mertle didn't make them think that they didn't. She and the others have even ditched Mertle to hang out with Lilo for a while, like in the episodes "Tank" and "Shush", and they seemed to have enjoyed their time with Lilo on both occasions up until going right back to Mertle in the end.
Not much is known about her personality because her character was not focused on a whole lot. She obviously enjoys the art of hula dancing, since she attends a hula class along with her friends. While she is mostly mean towards Lilo and Stitch, she is also kind to them as well, usually when Mertle is not around at all, so it's hard to tell whether she is a nice or mean person.
If she isn't dressed in her hula dance outfit when performing or practicing hula dancing then she can be seen wearing a pair of dark purple flip-flop sandals and a pair of dark purple shorts. She also has a light purple short sleeved shirt and a wide light purple hair band in her long, dark brown wavy hair. Whether or not she is the oldest of the other four girls, she does appear to be the tallest.
Family and Relatives
At the the very end of the episode "Wishy-Washy", there is picture of her with her parents just to show what they look like, but this is about all that is known about them.