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After reaching his divine realm, Chaos introduced Aruliel to everything in there for a bit, and then decided to bring her to the throne room. Aruliel was fascinated by all the people she met, bringing her a lot of joy in the way. She seemed to have forgotten what it felt like to talk with other people, and even had begun to think that she couldn't speak with others properly, but those fears were easily dissipated as she spoke with everyone.
After the initial introductions, Chaos decided to bring her to her new room and ended letting her have a rest there, she even took a warm bath, changed clothes, and shared dinner with everyone else, feeling welcomed in her new home.
Like this, Chaos let her "recover" a bit both physically and mentally, and to see how the fragments in her body would react as time went by while she was unsealed, trying to find if there could be any bad reaction, which might force Chaos to do something drastic.
Check "The Protagnist's Sister Is Actually the Strongest"!