I write Avid with some INSANE pain tolerance. Like, he spent years and years with a gaping wound in his neck, he's used to superficial pain and overall he's just tougher in that sort.
Hes loud, ofc he is, he's Avid, but a "OW!!!" at the top of his lungs doesn't necessarily mean it hurt all that bad, it just spooked him or he's basically saying "WHAT THE ACTUAL FUCK" to whatever hurt him.
This is especially fun when he's in a fight or conflict. Hes not really physically strong, and he cries like a bitch (/lovingly) most of the time-
But unless it hits his off button, a punch to the face won't keep him down. A sword slash to the arm won't get more than a wince, he could be actively pricked by a wither rose and what would usually send a seering pain through someone's leg, he will just limp through like his foot is asleep. My man has NO self preservation skills, misplaced confidence, and he was a fucking alchemist- look me dead in the eyes and tell me he wouldn't brew sm up and take a swig with Elle watching horrified like "Well, I'm pretty sure it'll work! If not, the worst that can happen is just a little bit of internal bleeding." And an hour later he's coughing up blood into a trashcan and joking/laughing to Elle "Glad it was me! Don't wor- *COUGH COUGH C-* Okay maybe worry a little-"
Again, he's still Avid. He's not great in physical confrontations, but that's more of an emotional and communication thing. Yknow, like begging someone not to stake him. Or two someone's.