Could we get some Cas!Cú relationship headcanons? 💙
ONE VERY GOOD BOY BEST DOGGO COMING UP.
Also, in case you haven’t read it I also did a HC about him confessing and kissing his Master. <3
Singularity F
Cu Chulainn (Caster) Relationships
Of all his potential summoning forms, Caster Cu Chulainn makes for the most well-rounded romantic partner.
It has nothing to do with the fact he’s the only one that can win a Holy Grail War. It aggravates the other Cu forms that he’s a “fake” but gets to win a Grail War.
“It was a singularity. I don’t think it counts. If it bothers you that much, do better.”
Doesn’t go out of his way to be cute, or do super sweet things, or wow his partner, but he does all of those things better than his other forms. He may be unlikely to do them, but if he does do them they will be incredible.
Scathach had to confer and give him permission to use those runes. He may not be wielding Gae Bolg, but he still gets to smack people around with his staff. As a Caster he gets the best parts of his other forms (without the same shitty luck stat that results in his untimely demise).
Outdoorsy. Will drag partner camping.
Loves taking a partner on hikes and nature walks. Helps them scale trees and teaches them to rock-climb. Thrills in showing them this beautiful world he gets to use mage-craft in.
Skinny-dipping in lakes and rivers is an absolute must.
Those scenes in movies where nude people make out under a waterfall come to mind.
If things have at least a 50.01% chance of turning out favorably for him, he will go for it. This applies in his romantic relationships.
Takes the risk of asking to try new things with his partner, in and out of the bedroom.
While he’s cool with routine, he doesn’t want to lose the sense of wonder that love allows him.
Calculating his risks is important, but calculating the happiness of his partner is more important.
Even though it becomes expected of him to make the first move in most situations, he tends to do it when it’s least expected.
This leads to behaving rather inappropriately in front of others, or leaving a partner flustered at a bad time.
The less he lets on about his feelings, the more he’s feeling. Unless he’s about to burst, in which case he will say exactly what he’s feeling.
Quite adept at expressing what he’s thinking when the situation calls for it. Would prefer to avoid opening his mouth if possible.
Communicative and agreeable. Will avoid conflict if possible, and doesn’t see a point to fighting in relationships.
Protective. It can be overbearing, but he does make a conscious effort to try not to interrupt his partner’s life.
He’d just… really like to know where they are at all times and it’s totally okay they have their own things going on, he doesn’t mind he’s concerned for their well-being.
If someone even so much as looks at his partner funny they’re getting a wooden stick to the face.
“You’re never the first person someone treats like shit. If they made it this far behaving like that, they deserve the lesson in manners.”
“Etiquette lessons can involve getting brutalized by a guy with a stick. Use your imagination.”
Loyal to a fault. Were he to catch his partner lying etc, he would struggle to separate himself from them. Attachment runs deep, and peeling back layers when he’s hurt is impossible. He’d rather sit in discomfort than move in pain.
Couldn’t fathom behaving in a manner that led a partner to feel scared or afraid or violated, so he figures he doesn’t have to worry about getting stuck with someone acting like an ass.











