The Mannequin is the character customization tool in Raid Mode. It lets the player customize their selected character in multiple ways, such as to select weapons, custom parts, passive and active skills, current level, gestures and costumes.
The mannequin also display all character's top reached level and their Rest Bonus. The player can change a character's level with the mannequin, though it's also possible to do that on the Red Door.
Every time a new skill or character is unlocked, the mannequin will display a red number on it which indicates the number of new items the player hasn't interacted with yet.
Skills can only be obtained and leveled up through the mannequin. It is unlocked by default in the Vestibule.