Because Samandriel, even as an angel, just seems vulnerable and like he needs to be protected. You can tell he respects humanity, he didn’t try to force Linda to give over Kevin, he introduced himself as Alfie after Dean said to stick with it. He said Castiel’s problem was too much heart, not as an insult to his emotions, but rather because he was being honest. Which means he values it and would rather not lie, even if it would be more convenient to.
You can tell he doesn’t resent the Winchesters, like other angels might and clearly do. He shows them respect.
He tried to warn Castiel, tried to save him when he found out what was happening, didn’t want Castiel to be manipulated. You could just see the awe and love in his face when Cas saved him.
When Dean said Cas didn’t make it Samandriel just had this look of sad acceptance. It hurt him to know that Cas didn’t make it. He already loves Castiel, that much is clear.
I can see him developing a respect and love for Dean just like Cas did. I love the thought of Dean and Castiel protecting and guiding him. He and Cas would have little conversations in Enochian about humanity and Dean. Dean teaching him how to dress and talk to people. He would stay and help Sam with research. Both him and Castiel discovering different foods with both Winchesters. Dean would insist on pie and Cas would say they should go find some burgers. Sam would try and teach Alfie about good eating habits and Dean would scoff and shake his head. “He’s an angel, Sammy, doesn’t even need to eat.” “Still couldn’t hurt for him to eat something decent.”
At night the three of them would go to the bedroom and explore, hands and mouths moving all over. Dean and Castiel could give him his first orgasm and show him carnal pleasure.
I see him as such a sub. Like, right now Cas is definitely a sub, he doesn’t want to be anywhere near power and Dean is a dom by necessity. But pretty much no matter if it’s canon-compliant or entirely au, I see Samandriel as a sub. He’s the one who would be there when either of them was stressed, give them the tactile affection they need. All of them would cuddle like crazy, leaving the heat off and huddling in under the blankets. In a lot of au’s I see Cas and Dean being switchy, they can go either way, especially depending on which version of them you’re using as a base. But I always see Samandriel as a sub.
Dean wouldn’t have to say everything, how much he loves them, because they would both be able to feel it from him. And yeah, his life sucks, it kills and burns everything, but they’re fucking angels and even when Cas has died he came back. They don’t need to worry about demons and all that shit, they can kill demons just by touching them. The Winchester’s life is fire, but an angel can burn back, can smother the flames and clean up the wreckage.
Stuff with lore and creatures would get easier for sure.
Just… Dean needs someone (as far as a long-term relationship) who can give everything. Because when Dean Winchester loves someone, he loves with everything he is, everything he has goes into that person and it’s really fucking painful and unhealthy but he doesn’t know any other way. Angels were made to love with everything they are, it’s how they’ve been programmed. So for Samandriel and Castiel, giving everything is just a matter of being there.
Even when he was at war, Castiel always came when Dean needed him. He doesn’t know how to love with anything less than his entire being and you know Samandriel would have to be the same exact way. These three could be in a relationship and get back everything they give. It isn’t the healthiest, but they’re all taken care of just the same.
I just… I have so many feels about these three, especially together.