Easy vote for Cube. He was the latest villager to move in my town and he's great. I also love Boomer. I had him for a long time before he decided to move out.
100% Aurora, but I had Iggly as one of my first two starters and (although I didn't keep him, and didn't adore him) he's gotta be the most charming out of the penguin villagers for me! The way he is just always looking up is so cute lol.
I’ve never been to attached to any of the Penguins but I’ve had Aurora on my island for a while (random move in on an empty plot) and she’s pretty chill, no pun intended lol