Watching them figure it out in fan works can be incredibly grounding. They're both classic 'outsiders' in the Titans, but for such different reasons—Raven's burden is this immense, internal cosmic weight, while Gar's is this hyper-external, visible, physical mutation. A lot of the fics I gravitate toward play with that contrast. Raven learning to accept the messy, loud, chaotic parts of existence through Gar's relentless optimism, and Gar finding a space where he doesn't have to perform, where his sadness is allowed to be as valid as his jokes. It's never a simple 'he fixes her' or 'she grounds him'; it's more about building a shared language.
Some of the most effective stories use the soul-self and animal transformation as literal metaphors for emotional vulnerability. Letting someone see your soul, or choosing a stable form when you're with them. I read one where Raven, after a nightmare, finds Gar in the common room as a quiet, warm-blooded animal like a sloth, and she just sits with him, no words. That silent understanding, the permission to not be okay, captures their growth better than any grand confession. The pairing works because the growth is mutual and hard-won, not destined.