Felicity was cultivating peacefully while Killua, at her side, was reminiscing on the past. It was like Killua couldn't get over the fact that Felicity accepted him again.
Despite his outer appearance of a cold person, deep inside, he was so attached to Felicity that he even considers her his mother.
Killua would stare coldly often, but despite that demeanor, he was different. He looks different to Felicity, attached to her that he even considered her his mother.
Felicity was not his mother, obviously, but she was only his mother figure. Because of the rough experiences he passed through, and only Felicity was there for him, he got the affection of a mother only from Felicity.
And just like that, Felicity became his mother, which eventually she accepted and believed as well.
However, on the other hand, Senior Hui was worried. Now that the legacy was continuing, there was a concern that made him overwrought.
