Yet he feels like something is wrong, that something is missing. This made the ice spirit uncomfortable after the war with Pitch Black.
Who he is now is different from who he was, at least, for a little bit. Every time he looks at Jamie, the thought of being dead and leaving his family behind kills him. At the same time, he's thankful that he exists.
"What happened to them after I left?" he asked himself the same question ever since.
Being cooped up in the factory of Claus without anyone to talk to is one of the reasons why he's thinking about this deeply. Jack went outside for some fresh air.
As soon as he stepped outside the building, the Moon asked why he's troubled. Jack Frost feigned a smile, "Ah, nothing. I'm just bored." His old friend didn't respond, and just like always, he just looked down on him.
"Look, it's something I need to find out myself, alright?" He flew away from Claus's factory without saying a word. For a moment, he's just going nowhere, until what he said echoed in his mind. He then decided to go to the 'frozen lake.'
Familiar trees surrounded the lake, although they're only a few of them left. The lake was almost unsolid. The hooded ghost delicately landed his feet on the ice. He remembered the first time he woke up here; the Moon raised him high before letting him fly by himself, and he found a staff that's surprisingly carved into a perfect shape. Jack wanted to skate again. Instead, he just looked around, finding where his flesh vessel was last placed.
The Moon told him to stop, and he did, although Frost wondered why. "Look down?"
A pattern was carved into the ice, which turned out to be the mark of his grave, made by the Moon itself. The guardian glanced at him, raising his eyebrow. He kneeled down to touch the markings, and every memory of his childhood was slowly coming back. His reflection shifted to his mother's face, then to her beloved sister.
As the flashback goes on, tears started to fall. Jack Frost laid down and sniffed. "Why couldn't I just live with them peacefully, and maybe pick me after I died?"
The Moon shone bright, and he heard a voice. It was a familiar one, but he didn't expect to hear and see him physically. The Moon went down just to comfort the lonely guardian. "You did live peacefully. I gave you a chance to do it again."
"Why?"
"I thought you already figured it out, Jackson."
Frost admitted to himself that he looks embarrassing in front of him. He can't stop the wave of emotions; he just let his old friend watch him being weak.
The Moon left the guardian crying on the ice. "A soul like you deserves a chance to experience it all again. You'll get the answer yourself, right?"