"I'm free!" Kumoko's personality goes through several developments during her time as a spider. In the beginning, she is overwhelmed and stressed by her situation upon realizing that she reincarnated as a large spider monster, but remains hopeful. She even sets up some long-term goals for herself, such as learning how to talk to communicate with humans and other such details. She likes to relax in homes of her making and is easily scared if approached. She cries when she needs to eat the disgusting monsters of the Upper Stratum and is traumatized by some early events, but steels her mind with the goal set: get stronger, so she can leave the Great Elroe Labyrinth. As a coping mechanism, Kumoko tends to act and think in a happy-go-lucky or sarcastic manner. It distracts her from the situations she finds herself in a while in the Great Elroe Labyrinth because often she is fighting against the odds and facing death every day. As she experiences more and more hardship, her mind does start to wear down, little by little. Some examples of her difficulties are: losing half of her body, eating rot-infested bugs and poisonous monsters to avoid starvation, and losing her home. Those, among many other situations that no teenager should ever find themselves having to experience — cause her to lose hope and empathy, which she had during the beginning of her rebirth as a spider. However, it can be challenging to see this due to her mannerisms. Not to mention, the titles and skills she learns throughout her journey interfere with her mind and soul. She talks with herself when using the Parallel Minds skill and earns several mind-altering titles such as Merciless, Ruler of Pride, Sloth, and more. She eventually gets the title Ruler of Perseverance, which prevents the System from tampering with her soul further, due to earning Heresy Nullification. Still, accruing these titles and skills alters her mind irreversibly. By the time she leaves the Great Elroe Labyrinth, she barely considers interacting with humans beyond what will benefit herself. Some of her conscience remains, as evidenced by her tendency to save people under attack by bandits—though it is implied that she ultimately consumes the bandits due to the influence of her parallel minds. Kumoko doesn’t consider this behavior normal, as she still views herself as mostly human and is disturbed by their actions, which were altered by her consumption of the Queen Taratect’s soul. Additionally, she doesn’t seem particularly interested in being friendly, as Kumoko consistently tries to justify her actions with selfish reasons, such as raising a skill, earning a title, or finding various other excuses.It is plain to see after she begins her journey with Ariel that she is still capable of caring about others, even after her traumatizing experiences in the Great Elroe Labyrinth. However, she always tends to think of herself first. She's also utterly tongue-tied because of her two years of solitude, though she can still think of responses. As the group journeys together and Kumoko begins to care about them, her selfish justifications become more strained, as she seems to find herself unable to believe she can genuinely care about others anymore. Eventually, when Ariel selflessly throws herself between Potimas and Kumoko to save her, she discards her selfish reasoning for helping and realizes that she cares about Ariel and the rest of their group, even if she still has issues talking to them.