lucina_(spring_exalt)_(fire_emblem)
Tag used for Lucina (Fire Emblem) from Fire Emblem specifically when dressed in her bunny girl attire from the Fire Emblem Heroes 2017 Spring Festival banner.
Can typically be identified thanks to the attire's characteristics: white pantyhose, puffy short sleeves, white see-through microskirt, black leotard with a light blue underbust with gold trim that gives the impression of black diamon shapes, white gloves, a yellow easter egg, a light blue frilled choker, white rabbit ears. The fake animal ears includes a set of teeth and eyes + nose.
Note that it's possible (especially for older artwork), to depict Lucina in a bunny girl outfit without it being the one described above, in which case this tag should not be used.