Eridians donāt know how much is too much for humans. Totally different sensory processors, totally different levels of pain, etc.
So I can imagine Rocky being a lil too rough with baby Grace, and tussling his hair a little too much. And poor Gracie baby is suddenly in tears, mumbling about bullies and begging Rocky to stop (in babbles, of course)
Rocky is immediately soooo guilty. Thatās his pebble. He just hurt his pebble. Oooh fuck, statement.
Loooots of cuddles and reassurance ensues, and they agree Grace has to tell Rocky when it hurts, in exchange for Rocky being a little gentler and slower
Pebbles are able to withstand the regular rough housing! Their shells/carapace isn't fully developed but is certainly far stronger than any human flesh.
And this is unfortunately something Rocky forgets about when he's too in the moment ;^; he's just so proud of Gracey for being able to hum his eridian numbers that Rocky ruffled his hair
But whoops, those claws are STRONG and very much yanking at Grace's poor scalp! And Grace immediately starts crying and pressing his hands ontop of his head, pleading for Rocky to stop, that it's all hurtie!!!
Ooh Rocky feels SO BAD he didn't mean to hurt his pebble ;^; he'd NEVER purposely hurt Grace! Rocky immediately stops and starts to chitter gently to Grace, apologies for what he did, trying to explain that he was just proud of Grace and forgot he wasn't an erid pebble
After that Rocky definitely has Grace use his "brave boy" words to tell him when things are too rough! Grace is a bit hesitant at first because he doesn't want Rocky to feel bad but, Rocky reassures Grace that Rocky feels worst not being able to know when things are too much for hia pebble!
Grace gets better at telling Rocky when a squeeze is too hard or a tone is too sharp for his ears. And Rocky responds with going more gentle, using softer trills and praising Grace every time Grace tells Rocky his boundaries ;u; š