Kindness

Kindness is one of the Souls that fell into the Underground, and it's the Green Soul. This soul is also used in Undyne 's battle where she transforms Frisk's soul into green, which corrisponds to Kindness. The Burnt Pan may have been used from the green soul human to use the pan as a shield, as seen in Undyne's battle, too.

Trivia

 * Kindness was captured by Asgore, to destroy the Barrier, but this mission then failed in the end.