Rosy

Manipulation: She detests having her low self-esteem used to control her immense cosmic powers, something she experienced directly from Mabel in her home universe. Extreme conflicts: She dislikes high-tension or violent situations, which tend to overwhelm her easily due to her sensitive personality. Feeling used: She deeply dislikes realizing that people approach her solely to exploit her magic or interdimensional abilities.

Being at peace: Because she constantly runs from characters who want to take advantage of her abilities, she prefers calm and conflict-free environments. Helping (despite her fears): She shows compassion when interacting with other broken or needy characters, even going so far as to give a soul to Ink!Sans in the anime. Quiet dimensions: She enjoys escaping to universes where she can go unnoticed without her power being the center of attention.

Code Manipulation and Repair: His most notable ability is the capacity to repair corrupted code from alternate universes (AUs). Temporal State Reversal: He can return a character's code or essence to a previous point in their life or timeline. Soul Generation: He possesses the extremely rare ability to grant or manifest a soul to beings that completely lack one (as seen in his key interaction with Ink!Sans).
Defensive and support strategy: Due to his nature, as he is often a victim of manipulation stemming from his low self-esteem in various parts of his story, he does not possess direct destructive attacks or an aggressive combat arsenal (like Gaster Blasters or the bones of the Sanses). His "attacks" are utilitarian in nature, focused on rewriting the physical or existential conditions of his environment through the manipulation of the universe's data.

Shy and with low self-esteem: She constantly appears insecure, fearful of conflict, and prone to crying. Submissive and easily manipulated: Due to her vulnerable and fearful nature, she often gives in to dominant figures or those with dark intentions. In her lore, this led to her being exploited by Mabel (in a Reverse Falls-type universe) and later deceived by manipulative characters like Ink!Sans. Evasive in the face of danger: When faced with situations of extreme pressure or mistreatment, her primary defense mechanism is not confrontation, but rather escape or flee across different dimensions of the multiverse.

Humanoid Skeleton: Although his design inherits the aesthetic of the Undertale multiverse, he possesses more stylized and refined features than the average Sans. Facial Structure: He has large, expressive eye sockets that denote his shy and sensitive personality. His gaze often reflects sadness, worry, or low self-esteem. Upper Attire: He wears a loose-fitting, high-necked blouse or sweatshirt with long sleeves that cover part of his hands, accentuating his withdrawn body language. Neck Detail: He adorns his neck with a tied ribbon or scarf (similar to a bow tie), giving him a formal yet subtle appearance.