Warning: Spoilers.
A little disappointed, but it’s my own fault for expecting more. I just thought the ending of this event was a little lackluster. In other words, there wasn’t much to it. But I guess that’s to be expected from something simply about taking care of cats.
Here’s the cat. I’m not gonna say his name, yet. Wait til you see what the devs did. 
Since this is the one we adopt, there was no guest. So, I had Kaeya sit next to him, and now he’s the “guest”. (Though, I still think they should have put someone here, regardless. People can just look.)
The usual close up shot.
Size comparison in Teapot. He’s a big boy.
Now for the story part of this. Warning: Spoilers. (Not even gonna screen any nonsense that Paimon says.)
Bro, he’s huge.
I knew it! It was a Knights of Favonius emblem!
Do you see?! Do you see what they did?! Lazy. (It’s not even a good name. It’s silly.)
I was fully prepared to blame Paimon for this name, and technically, she is partly responsible; but I recognized the name immediately. And it is definitely the developers fault. I can’t believe they did that.
This used to be Sir Pouncelot. They changed his name because of this event. Seriously developers? You couldn’t think of something different for the new cat?
He’s in Chenyu Vale, Liyue, in that tea village. You give him back his food that a Pelican stole.
How’d he know his name? (I had figured it was already his name and there was this huge coincidence, but it still caught me off guard when he said it.)
That name. Not gonna lie, for a second, I almost thought Albedo turned Kaeya into a cat. (But then I was like “nah, that wouldn’t make sense”, though; ‘cause then we can’t keep him, as we would need to turn him back. That would be an interesting event story line, though.
) I also thought they might have experimented on the cat. Thankfully, that wasn’t the case.
Why did the Investigation Team even have a cat?
That's good.
I wonder how big he got before Albedo treated him. (You know, they mentioned how being bigger made it harder to survive because he can’t hide and won’t be as nimble, but like, tigers and other big cats exist, so… Well, I guess you could say he wasn’t accustomed to that kind of change, but still, their reasoning.) I’m kinda glad he’s gonna stay that size.
I want to imagine Kaeya watching over him, and being the best at it.
Children shouldn’t be allowed to name living things. 
(Okay, it’s not the worst name, but it could have been better. I’m just not a fan of it.) Honestly, why couldn’t they let the player name the cat? We can name a playable character, but we can’t name a cat?
I agree. I’d rather Rosaria be called “cat whisperer” over Paimon. Though, no one here is actually a cat whisperer and they all need to come off it.
Anyway, it’s nice that Rosaria found her calling. Cats. 
By the way, I took care of the cats, not Paimon. I fed them, played with them, groomed them, and established trust. Paimon just floated there, watching, and then taking credit. Like she always does. 
Sorry for being cynical, again. I’ve just had it with certain things.
Final Thoughts:
Was hoping Kaeya would show up. I still think the cat looks like him. (Sure, maybe if it had black fur, it would be closer, but the tan color works, too.) It’s been almost a whole year since he’s officially been in an event. We only got a letter from him last time. Or am I forgetting something? They didn’t put Albedo in the alchemy event, but he was in this one. Albeit, for a brief moment.
