Dormant Sentimonster is a frog-like hungry sentimonster created by Wang Fu when he previously used the Peacock Miraculous 172 years ago during his training to become a guardian. Because of Fu's negative emotions, the sentimonster began a rampage on the guardian's temple, eating all of the Miracle Boxes and swallowing all the Guardians in the process, while it chased Fu, who was with the last Miracle Box. However, it fell into a pit filled up with lava, being encased in molten rock for the next 172 years, although this caused Fu to lose two Miraculouses and the grimoire.
In "Feast", after being found in Tibet by Mr. Kubdel and freed from its rock case by Mayura, the sentimonster gets akumatized by Hawk Moth into Feast, increasing the creature's size to make it bigger and stronger.
The dormant sentimonster has a frog-like purple body and the size of a dog. It has a white border of the guardian's symbol in the middle of its the face, which might be his only eye.
Feast maintains his original exact physical appearance of before being akumatized, except now his size has increased greatly.
Being a sentimonster created with the emotions of anger and hunger towards the Miraculouses, it can track down the jewels and devour anything in its path. It also has a long, sticky, frog-like tongue, which helps it to restrain obstacles. Whatever it eats will be trapped in a pocket dimension within its stomach for all eternity. However, some objects are better preserved than others, such as Cat Noir's staff (not preserved) or Wang's metallic staff which contained the amok (preserved).
Being an akumatized sentimonster, Feast is considerably more powerful. The sentimonster's now-enormous size allows it to pass through obstacles by jumping, like buses. Feast may have had increased speed resistance, since it caught up with and continued to chase after Fu without getting tired.
|Miraculous: Tales of Ladybug & Cat Noir Theme Song:||Absent|
|1. "Chameleon":||Absent||14. "Stormy Weather 2":||Absent|
|2. "Animaestro":||Absent||15. "Kwamibuster":||Absent|
|3. "Bakerix":||Absent||16. "Feast":||Appears|
|4. "Backwarder":||Absent||17. "Reflekdoll":||Absent|
|5. "Gamer 2.0":||Absent||18. "Ikari Gozen":||Absent|
|6. "Weredad":||Absent||19. "Desperada":||Absent|
|7. "Silencer":||Absent||20. "Startrain":||Absent|
|8. "Oni-Chan":||Absent||21. "Timetagger":||Absent|
|9. "Miraculer":||Absent||22. "Cat Blanc":||Absent|
|10. "Oblivio":||Absent||23. "Félix":||Absent|
|11. "Party Crasher":||Absent||24. "Ladybug":||Absent|
|12. "Christmaster":||Absent||25. "Heart Hunter":||Absent|
|13. "The Puppeteer 2":||Absent||26. "Miracle Queen":||Absent|
- The Dormant Sentimonster is the first sentimonster to be akumatized by Hawk Moth.
- By extent, it is also the first sentimonster known to ever be akumatized.
- The Guardians' downfall was caused because of the Dormant Sentimonster. This was later fixed by Ladybug's Miraculous Ladybug.
- It is the first known sentimonster to have control of itself, although Mayura threatened to destroy it if it tried to rebel against her.
- It is the first sentimonster not to have a name until it was akumatised.