Mel is the 3th human SOUL also known as Integrity, out all of the human SOULs Mel is the youngest that's why she acts childish and can be really energetic but at the same time she's also really sweet, she has an older sister that is Ashley (perseverance) and they both died against Asgore, Mel usually doesn't like talking about her death, Mel is also a fanatic of hugs (just a side note: this is NOT the Mel from Undertale: Kindred spirits)