Shared Existence

The sin of pride didn't vanish from the dimension, but its physical state is almost non existent. Since Sue and Icarus share the same soul existence, they cannot let Icarus roam free while they are trying to continue their journey. If Sue recovers her existence wholly, Icarus will too. The whale told them that it can provide help to their dillema.

"I am tranquility's warden. I roam around the sky to imprison entities that usually go against Mute." The whale explained its role to the world, and that it has an ability to seal entities in the area.

"So you are not just a mount for travel?" Everyone asked in sync and it made the whale laugh. The whale added that they also shouldn't worry about it being Mute's servant, it is just living to seal away entities. Icarus is one of Mute's most hated entity in tranquility, so the whale can just seal it away like normal.

"Maybe it is fate that I met the sin of pride in this island with you all."

The whale told them to get on the saddle as they need to get out of the island before it can seal the whole place together with Icarus in it. It started to chant unknown and indescribable phrases as soon as they fly away from the place. When it was done speaking, opaque white walls surround the whole island - seemingly enclosed it in a cube. The cube then was stamped by out of the ordinary letters all over its build.

...

While traveling with the whale in the skies, Nikita asked everybody if the reason why Lily defeated Pitch is because they simultaneously lost all of their existence in their battle.

"It seems to me that the alter and its human's existence is linked." Nikita added, and Sue agreed to what she says and tells them that she felt a part of her existence is being used whenever Icarus morphs its arms.

"But that's just it. Icarus looks helpless now, but look at me. I am still good though?" Sue added.

"It's hard to fathom everything that this dimension has." Sven replied, and Spark tells everybody that alters share the same existence their human has but if the human tries to forget them, they will weaken physically and not existentially. Icarus might recover a lot of existence if Sue will reach the memory crystal, but what's the use if their physical body is already impaired?

"So you mean only their physical body matters?" Asked Nikita and the flaming energy gun replied affirmative.

"If you're low on existence, your body will disintegrate. If alters' body disintegrate, they will die. If they are out of existence, they're just going to be unable to use magic anymore. They share the same existence to their humans just as an advantage to devour them easily, nothing more."

"Alters have way too much upper hands against us, eh?" Sven replied.

"What really happened to Lily then?" Asked Jae.

"Well it's simple as it seems. Lily defeated Pitch in exchange of her whole existence." Nikita answered with the usual poker face again.

"Lily had it rough fighting alone an alter, while her existence is that low already. I feel kind of bad." Sven added with a sad face, feeling like Lily gave her all just not to get devoured by her sin.