If she's concluded that he's only stable when he's lonely, and that there's no avoiding him going insane, the least she could do is let him die in peace, finally. Princess Bubblegum absolutely did this for herself.In spite of how disturbing it may seem, Princess Bubblegum didn't bring back Lemongrab for her. Eventually, Lemongrab will be the same awkward, clueless individual, but tempered with the love and care that he got from his Lemongrab 2 component and his mother. With this wisdom, Princess Bubblegum doesn't need(or want, since it wouldn't be the same person anymore) to change Lemongrab's personality. When Lemongrab exploded, Princess Bubblegum had come to realize why he turned so bitter. Peebles first attempt was to make Lemongrab 2, and look how that turned out. Lemongrab's Reset Button on his life was PB's attempt to Set Right What Once Went Wrong.Princess Bubblegum's first attempt to raise Lemongrab turned terribly- she rejected him out of fear and disgust, and without care Lemongrab wallowed in his own misery and hate. whatever went wrong with Lemongrab 1 was already beginning to show in his treatment of Lemonhope, and Lemongrab 2 was trying to help fix that to the best of his ability using the doll. After viewing the scene again after the first time, it doesn't come off as a simple game, it comes off more like a form of therapy.

When Lemongrabs 1 and 2 go to play with him, Lemongrab 2 doesn't seem to be merely playing, he's directing the scene, providing context and trying to coax Lemongrab 1 to a specific conclusion: letting Lemonsweets sleep. Lemonsweets looks conspicuously like Lemonhope. Traveling further down the guessing rabbit hole.No one but crazy!Lemongrab and himself calls him Bad Lemon No Hope, so his actual name may really be Lemonhope, because the purpose of his creation was a hopeful one. Delving into further guessing, he was created to cope with the death of Lemonjon (either the Princess assisted with that, or the Lemongrabs had access to the candy life formula after it was erased from their brains).His behavior and appearance suggest a more direct relation to both Lemongrabs than the other lemon children, so their genetic material may have been involved. He also was nowhere to be seen in All Your Fault. Lemonhope was created after all the other lemon children (and several other WMG's related to why that would happen)Several things about him make him very different from the others, and he seems to have been created with more logic than them as well.

Adventure time lemongrab