Pricilla

Wikipedia:

Pricilla is a pink-haired girl who met Van for the first time in an armor battle tournament. She loves to pilot her armor and gives all the prize money she wins to the efforts of her sister in raising orphans. She controls her armor through a control interface system which allows her movements to be directly mimicked by her armor, thus taking advantage of her great athletics. She later joins Van's company and also gains a crush on him, to Wendy's chagrin. She is not afraid to show her feelings for Van and the Eldorado Five even once enthusiastically encouraged her to purpose a marriage to him, seeing her strong feelings.

Another thing which seems to irritate Wendy (and Carmen), is that Van managed to remember Prisilla's name almost right away after their first meeting, while it took him several episodes to remember Wendy's.