Spirit
A spirit is the lingering remains of a person which persist after their death.
Spirits generally appear to people who have a close connection to them, but this isn't always the case (as shown by Manatsu). Spirits can appear for a variety of reasons, and not all are for the betterment of the person they appear to. Often, remnants of Magical Girls' memories or magic can appear to other Magical Girls they knew, even if they previously turned into Witches, albeit more rarely, as seen with Mel. Additionally, some kinds of magic, such as Yachiyo, Ren, or Asahi, allow them to commune or summon the spirits of the dead. Specifically, when Asahi called upon them, she evoked them simply from the "underworld," but Asahi herself questioned whether her magic called forth actual ghosts, or simply made constructs which appeared as ghosts. On rare occasions, the spirit of a dead being can bond and get entangled by that of a Witch, which grants them great power. Such was the case with Kei Seto.
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A remnant of Mel Anna's spirit -
Mel Anna's spirit in Episode 25, unlike Episode 12 she has a pink outline and doesn't speak -
Kei's entangled spirit
