Meigo Arisa is a Level 0 esper—basically someone with psychic powers that basically don't register on any meaningful scale. She's a singer working toward her big break, spending time doing roadside concerts until she catches a major break: winning an audition to perform the opening campaign image song for Endymion.
What's interesting about Arisa is that she's tangled up in some kind of mystery that goes deeper than her music career. Stiyl Magnus has suggested she could actually be significant enough to spark conflict between the magic side and the science side—which is a pretty heavy implication. Fans often note that this hints at something larger about her role in the series' larger conflicts, even if her actual power level as an esper seems unremarkable.
Content compiled by AnimeList.moe from publicly available sources.
