A barrier such as not being able to communicate would not keep Orca!Eclipse from courting a siren reader. It would confuse him at first to realize he can't quite hear you, despite your desperation in attempting to communicate in the hope he won't attack/eat you, but he takes it in stride. He immediately begins finding ways to help you communicate by making symbols and gestures with his hands to convey his meaning, and you begin to catch on: Fish. Ice. Air. Breaching. Gift. A courting gift. A gift for you. You start to find ways to express longer, complex thoughts, and he listens. You... don't remember the last time someone listened. You're alone. Eclipse says he is too, but not anymore. And neither are you.
The last time you sang... You can't recall. No one could understand you, and there is nothing lonelier than singing alone. Sirens are meant to share choruses and harmonies and when Eclipse asks you to sing, you tell him no. He's disappointed and coaxes you, promising it will be alright. He wants to sing with you too, but he won't understand your melody and it will turn sour and fall flat and—
Eclipse takes your face in his hands and cradles you close. He promises. It will be okay. Please. Sing for him.
You swallow heavily. He holds your gaze with his burning eyes, and you dare to try.
A croak slips from you. You try to turn away but Eclipse holds tight to you, urging you to do it again. Don't get up. You almost shake your head but there's a hum in your chest. It wants to be free, and you clear your throat and try again.
A song no other siren can understand emerges from your lips, but Eclipse listens. He closes his eyes lays, his head against yours, and sways softly as you sing louder and stronger, lifting it to the starry sky before he joins you.
You almost falter—his song is so beautiful and it doesn't go well with yours, but Eclipse doesn't stop and neither do you. His voice dips low and settles into a gentle layer of sound underneath your own, and though it is strange and unlike anything you have ever heard... it sounds lovely. Your song. Yours and his.