the guardian

She suffers from PTSD (post-traumatic stress disorder).
Experiences very intense survivor guilt.
He has episodes of psychosis (visions of the Shadow Tubby).
She becomes more paranoid, irritable, and emotionally unstable.
In the DLC, Miles makes fun of her psychotic episodes, while Anne tries to be understanding and help her.
Summary of key features:
Feature
Description
Intensity
Courage
Face monsters without hesitation
High
Curiosity
He needs to know the truth at all costs
High
Emotional loyalty
He became very attached to the people he was watching.
High
Distrust
He easily distrusts others
Medium-High
Empathy
Variable depending on choices
Variable
Mental stability
It degrades progressively
Decreases

Empathetic/reasonable version:
She is understanding, concerned, and kind. She tries to calm others, asks if they are okay, and shows compassion even in horrific situations. She can act protectively and maternally (or at least like an older sister) toward the survivors.
Aggressive/rude version:
She becomes curt, sarcastic, impatient, and hostile. She may respond with distrust or even verbal (and in some cases physical) violence when she feels threatened or frustrated. In this phase, she becomes more cynical and cold.
Despite this duality, its core always retains something of "hard on the outside, soft on the inside".
Psychological evolution throughout history:
As the plot progresses (especially in Slendytubbies III and the DLC The Apocalypse), his mental stability deteriorates noticeably:
She suffers from PTSD (post-traumatic stress disorder).
Experiences very intense survivor guilt.
He has episodes of psychosis (visions of the Shadow Tubby).
She becomes more paranoid, irritable, and emotionally unstable.

Determined and curious, she relentlessly pursues answers about the origin of the infection, the mysteries of her species, and how to stop or cure the outbreak. Her primary mission is to monitor the Teletubbies (Tinky Winky, Dipsy, Laa-Laa, and Po) and collect custard for research.
Brave and intelligent: he survives numerous encounters with the infected, knows how to pick locks, and uses tools like a flashlight and night-vision camera. He faces dangers that would make anyone else run away.
Affectionate and loyal (at her core): she developed a strong attachment to the subjects she secretly observed (she considers them friends, even though they were unaware of her existence). Their deaths affect her deeply emotionally.
Depending on the player's choices, it can be:
Reasonable, empathetic, and kind (concerned about the survivors and showing compassion).
Rude, aggressive and distrustful (hostile towards the situation and other people).
Most consistent traits: rational, distrustful (useful for survival) and with a "tough on the outside, soft on the inside" side (she can be abrupt or cold in dialogues, but generally seeks to solve problems).