The post where the S/o /master getting turned into a child is the cutest thing I have ever read in my life. Could you do a similar theme with Karna, Siegfried and Diarmuid? I'm living for this kinda fluff.
Honestly, when Siegfried wakes up to see a smaller, younger version of you curled up against him, he’s confused. Is that you? Or did Chaldea suddenly get a kid that snuck into his shared room with you?
But when you wake up and just blink at him sleepily, he can see the resemblance you hold to your older self and he’s just lying there staring at you, extremely confused that you’re now a kid.
Of course, he takes it into stride and takes care of you regardless of your current age and size. He gently scoops you into his arms and soothes you when you’re frightened by other servants and he carries you around the entire time while showing you around Chaldea.
Judging by your lack of memories, Siegfried believes that it’s probably a temporary curse or something, so he just consults other Caster-type Servants for help while he babysits you.
You’ve taken an interest in his wings and tail and though he’s wary of you pulling on them too hard or potentially getting hurt, he plays with you much like a father would with their child.
He swishes his tail back and forth pretty often seeing as it distracts you easily. He’s started to do it just to keep you occupied.
He gets worried that you’ll hurt yourself considering how adventurous and playful you are. If he takes his eyes off you for even a second he’s certain you’ll run into trouble.
The first thing Karna does is go seek help from the Caster-type Servants. He has faith in their knowledge on these kinds of things, but he’s also just so confused.
He’s never taken care of a kid, and definitely not one that was supposed to be his master and significant other.
Karna reads up on how to take care of kids though and tends to spoil you a lot in the process. Whatever it is that you want, he’ll give it to you.
It isn’t until Emiya catches Karna feeding you too many sweets that Emiya scolds him and explains that even if this kid is you, he can’t just spoil you.
Although Karna lessens the amount of spoiling, he still teaches you all sorts of things. One of the new things being fighting techniques. It’s scaring some of the other servants though seeing their tiny master running around with a sword in their hand. You can hurt someone with that you know.
Getting you to sleep and getting you to listen to him is probably the hardest thing, your attention span is nearly nonexistent and he has no idea how to keep your attention besides through shiny things.
As much as he loves you and finds you absolutely adorable as a kid, Karna can’t wait until you’re back to your regular self again.
