Chronoa/Chronology

Human-Monster Interaction
In the Dwelling of Spirits, Rimuru attempts to save Shizu's students by having each take in a superior spirit to aid in stabilizing their energy. At Chloe's turn, an irregularity occurs and the atmosphere suddenly becomes tense. A powerful spiritual body, which is actually Chloe's future self, appears and subsequently possesses young Chloe. As a side effect, her energy became stablized.

Hero Awakening
Granbell tricks Yuuki into unsealing adult Chloe's body contained within the ark. Following the single world theory, young Chloe disappears, causing everyone to temporarily forget about her until adult Chloe's existence slowly adjusted in her current timeline. After Hinata's death, the two are sent back in time to 2,000 years ago. To return back to the present, they follow the same path. Along the way they befriend Luminous. When the topic of what Chloe's public name would be as a Hero (which she usually skipped in past loops), for the first time under Hinata's suggestion, Chloe took on the name "Chronoa," as she didn't want to disclose her real name to the public and attract her friend Leon's interest, causing undesired revisions to the future they recently departed from. As a result of the naming, Hinata's Usurper was stripped from her and integrated with Chloe, with the additional effect of the negative feelings within Chloe acquiring sentience. Observing this, Hinata concludes that Chronoa is akin to a monster.

After Chloe's consciousness disappears and Hinata assumes control, she struggles to hold back the raging Chronoa and fears that her and Chloe's plan will be ruined. Reaching the appointed time decided beforehand with Luminous, she once again gets sealed.

Back to the present, Rimuru successfully placates the raging Chronoa and resolves the situation. Chronoa goes through an upgrade into an information body known as a Manas, allowing her to better manage Chloe's abilities and switch out with her anytime.