- For other souls and traits, see Soul Traits.
|“||Your soul is very special Asriel. Mind if I take it? Akumu is hungry.||„|
|~ Bete Noire to Asriel about his soul on Dust|
The Rainbow Soul is the only Monster Soul that is not an upside-down heart. This soul has a white outline, with the inside of the heart changing colors. These colors are red, orange, yellow, green, light blue, blue, and purple.
- The Rainbow Soul makes Asriel just as powerful as a human wizard.
- Asriel is the only one who holds a Rainbow Soul.
- Rainbow Soul is just one soul, the soul has a small portion of each trait. It was confirmed by Camila.
- Chara's remaining soul has become a vessel for each trait in Asriel's Rainbow Soul.
- The Rainbow Soul is the closest a monster can get to having a determination soul.
- The Rainbow Soul is weaker than the Determination soul trait, but it's still powerful among other monsters. 
- ↑ http://camilaart.tumblr.com/post/166651025855/wait-so-asriel-is-the-only-monster-with-a-soul-in
- ↑ http://camilaart.tumblr.com/post/175018416260/just-a-question-asriels-soul-was-made-from
- ↑ http://camilaart.tumblr.com/post/175817456215/i-just-realized-something-if-determination-is-the
|Human Soul Traits||DETERMINATION ♡ Justice ♡ Patience ♡ Perseverance ♡ Bravery ♡/FEAR ♡ Kindness ♡ Integrity ♡|
|Souls||Monster Soul ♡ Human Soul ♡|
|Weakened Souls||Grey Soul ♡ Empty Soul ♡|
|Combined Souls||Rainbow Soul ♡ Two-Traited Soul ♡|
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