Bea: I was in love with her since Pocket Camp, that's where I first met her and wow omg I will protect her with all my heart. She's now the protagonist of my island, the student council (stuco) president, and a top notcher in her batch. Problem is that she's stupidly dumb with emotions, other than her achievements she's just a shy, normal girl and rarely expresses anything else. When she enters her final year, there's just a whirlwind of happenings that make her struggle but learn at the same time. I think Bea being a normal villager just makes this profile fit her a whole lot more than other personalities.
Genji: Idk I just really liked this jock rabbit, I love Asian-inspired characters and I also love rabbits! I kept him initially for aesthetics, but when I started formulating the backstories for my characters, I thought he'd fit perfectly as a co-protagonist and the main love interest of Bea (hehe). Jock soccer team player for the school, falls in love with Bea but since Bea is so stupidly dumb with emotions and Genji is so stupidly complicated with his history, it just turns into a long-winding road of tension and confusion and denial LMAO.
Felicity: I actually just got her from campsite, didn't plan for her to stay for long but her appearance screams "pseudo-peppy but actually very, very snooty". I imagine her to be someone who masks herself as a peppy villager because felines are known to be pretty snooty, but Felicity wants to be popular and really liked. She's Genji's ex, they kinda have a rough history, but they find themselves crossing paths more often than either would like. Also doesn't help that Felicity is stuco secretary, and her senpai Bea is stuco president, and Bea is somehow involved with Genji, and Genji and Felicity have history. Complicated??? Yes it is. Also she's Ruby's best friend, and whew Ruby is a WHOLE OTHER WHIRLWIND.
Ruby: I planned to get Ruby from the start since I really loved her in ACNL! I've always had a love for the moon rabbit folklore in Asian stories, and I believe Ruby was inspired by that. She's Genji's sister and Lobo's love interest (yes, very complicated wolf/rabbit relationship, Beastars-esque). She never returns Lobo's feelings however, because she is also a stupidly complicated character (like her brother), not in history but just the way she views the world in general. She feels that there's so much out there she wants to know and explore, so she doesn't feel the need to settle down any time soon. Totally fits her galaxy-themed room. Her peppy personality also fits very well with her profile since she's just excitable about everything and anything, especially things she doesn't know too well.
Lobo: Okay he was a very random pick from a random island, I thought "Hm he would fit well with Ruby's story arc." So lo and behond, here he is on my island, the perfect cranky wolf for a peppy rabbit. He's basically the spitting image of Legosi from Beastars, kinda just existing until he meets Ruby, so sudden that he just starts being so much active to keep up with Ruby's energy. He hangs around because he doesn't understand Ruby's feelings at all (because, as I said, Ruby is a stupidly complicated character and thus has never been really upfront with personal things) so all these mixed signals just confuse him. Eventually though, his feelings kinda evolve from romance to a willingness to just protect her as she navigates through life. He and Felicity also have some kind of tension, because Felicity thinks he's a threat to Ruby. (For non-main-protagonists, i think lobo and ruby have like the most complicated relationship. I just realized LOL)
Vivian: I can't believe I was so blind not to see her until I played ACNH and randomly stumbled against her. She's so PRETTY, her house is so elegant, I love her overall design and I'm happy she's a snooty because it fits her. From her aesthetic, I imagined her as a part-time model and the school's sweetheart, but somehow she finds herself gravitating towards Lobo even though he's literally just......... a normal wolf? She's also very confused with her feelings. But Lobo and Vivian are pretty close friends at the very least, Lobo confides to Vivian about everything going on in his life, including Ruby, and Vivian is less than pleased to hear about the rabbit but she rolls with it anyway because she is mature. Eventually learns to move on, but keeps Lobo close to her nonetheless. Pretty much inspired by Ami from the anime Toradora.
(okay i am taking a breather because WHEW these are the heavy-backstory characters. the rest below are more like side characters, but i still really love them and they fit in my island!)
Sherb: He was my FAVORITE villager of the new ones, he was also the very first islander I met when island hopping so I think it was meant to be. He is just adorable, I love his shade of blue, and his lazy personality is so cute. He's Bea's childhood & best friend, and he was invited to be the stuco's financer because he is good with math. He lounges around the stuco room, always with a snack, and he looks like the laziest animal in school. But he miraculously finishes the tasks asked of him. No one but Bea has seen him work, so it's always a wonder to everyone else how Sherb does his job efficiently despite being lazy.
Etoile: I am etoile's number one fan, of course I HAD to get her. I love little twin stars, I love animal crossing, i love starry pastel stuff, she's SO PERFECT i love her so much. I haven't fleshed out her backstory yet, but she's the stuco vice president, very hardworking! Also somehow she has a wide array of connections.
Fuchsia: tbh she was just my pick for uchi to complete the personalities! I actually found her randomly in campsite, I remember I was with my friend when Isabelle announced we had a campsite visitor, I told her "I kinda want Fuchsia." and WOW there Fuchsia was standing in my campsite LOL maybe it was meant to be. I think she's my favorite uchi so far, though I wish they'd release more good uchi designs like hers. Anyway, where she stands right now in the whole scheme is that she's a close friend of Genji, and a sort-of friend of Vivian. Rockstar vibes, she plays in a band, she's that really cool senpai all the girls look up to (and probably have a crush on, heh).
Shep: Stumbled across him while trying to look for Genji. Actually i didn't plan on getting him; I even saw him once during island hopping and skipped him. After much consideration with my lineup, I thought Shep was probably a good smug character so I took him in the second time I saw him. He's Lobo's best friend, he's a really good character overall and he loves jamming with Fuchsia when the teachers aren't around yet.
And an honorable mention: Julian! He was actually the stuco vice president before Etoile replaced him. I love Julian's design and smugness, he looks so fancy schmancy and rich and loves climbing the social ladder so that's why i randomly adopted him. He cares a lot about Ruby, more so that he actually also has some beef against Lobo for being too close to her. Yes I have well-thought-out cutscene between Julian and Lobo where they get into a fistfight when they find that Ruby is suddenly missing, because Julian suspects Lobo had something to do with the disappearance. Cue the drama and confrontations and the "why do you alienate me, just because i'm a wolf who cares about a rabbit" line. Etoile's very less dramatic than Julian now, but Julian still goes down in the history of Milkiss.
He's been here ever since because he's awesome. 
