Insecurity can rob a person of their full potential. Just Celia is one of several personality nodes possessed by Polycline-57. Initially, Just Celia is timid, plain, introverted, and eager to please.
In short, she sees herself as a doormat. Even so, she honestly loves being helpful and has a very strong work ethic. She's loyal, dependable, soft spoken, and far braver than she gives herself credit for being.
I haven't decided what chain of events causes her to activate her allotted portion of Polycline-57's superhuman abilities. Even so, her greatest power is the power of her heart & her inner beauty.