Esther is a very upbeat and charismatic Plumerian, who loves just about everyone she meets. Esther is very gulible, and can be a bit of a pushover at times. She will not stand for anyone being nasty to others, even if she doesn't like the 'victim'. Esther hardly ever thinks before she acts, and will often go running off on adventures without thinking through he dangers. Esther is a very compassionate plumie, and tries to cheer others up by telling awful puns. 
Esther does have a diffrent side to her though; she has a knack at noticing value and changes in things. Esther was always great at those games where you would see what is diffrent between two pictures. Esther knows how to assess value of something within seconds, and has a nasty habit of pocketing items. She's been trying her best not to, especially around Simon, but every once in a while you can't help stealing a little something.