Okay, so you're asking about Yuuji and Megumi's friendship in fics? I feel like a lot of writers get stuck on the 'found family' trope for them, which is fine, but I think the more interesting stuff happens when authors don't gloss over how fundamentally weird their dynamic is. Megumi is this incredibly closed-off, fatalistic kid who's spent his whole life expecting the worst, and Yuuji just crashes into that like a sunbeam wrapped in chaos. Fics that treat their friendship as simple 'sunshine/grumpy' are missing layers.
What I keep searching for are stories that sit with the inherent tragedy baked into their meeting. Yuuji's a dead man walking from the moment they meet, and Megumi, of all people, knows what that's like—he's built his entire worldview on sacrificial logic. So when Yuuji refuses to play by those rules, when he chooses to live and make Megumi want him to live, that's where the real friendship exploration kicks in. It's not just bonding; it's one person's philosophy of self-sacrifice getting systematically dismantled by another's stubborn will to survive for his friends' sake. That creates a fascinating tension.
I've seen a few darker fics that explore Megumi's potential resentment, too. Like, here's this guy who flipped your entire world, made you care, and then is constantly throwing himself into the meat grinder. That's gotta mess with you. The friendship isn't always comfortable; sometimes it's Megumi being brutally practical about Yuuji's cursed energy, or Yuuji having to navigate Megumi's cold, tactical exterior. The best fics show them learning each other's languages—Yuuji's physical reassurance versus Megumi's silent, action-based loyalty—without ever making them perfectly harmonious. They argue, they misunderstand, but the commitment is absolute, and that feels more real to me than any flawless buddy-cop portrayal.