Mirabilis is a Ljósálfar and one of Peony's closest friends. She's best known for her control over daydreams—a rare power that lets people slip into dreams while staying awake. This ability makes her invaluable to the plot, since she's literally the only one who knows how to reach Dökkálfheimr, and Peony seeks her out specifically for that reason.
Once she helps the Order of Heroes gain access to Dökkálfheimr, Mirabilis becomes a steady ally in their campaign against Freyja. Though she fights alongside them from that point on, fans often note her tendency to fall asleep constantly—which, given her daydream powers, is both ironic and endearing. It's a running gag that she struggles to stay awake despite (or maybe because of) her magical abilities.
Content compiled by AnimeList.moe from publicly available sources.
