Tbh I'd love it if Miraculous did something similar to the Tales of Ba Sing Se episode in ATLA (or even something like Zuko alone), which was an episode containing various short stories of every character. This could let us see more bonding or characters alone.
Idk, imagine seeing Alya's regular life; dealing with the twins, talking to her big sister, cooking (I mean, her mom is a cook so I bet Alya knows something too). Or just a glimpse of her inmer thoughts —what she thinks about the world, her current life, etc. Maybe we can see her think about her current status as Rena. She's aware of the danger. What does she think? Is she sometimes afraid anything can go wrong? Maybe this motivates her to train. Or we could see her chill writing for her blog and answering fans, or explaining her routine and ways of documenting Ladybug and Chat Noir's adventures.
Maybe we could have Adrien and Nino hanging out as real friends and have Adrien help Nino similar to how Nino helps him a lot. Them just having fun as teenagers. But we could also have Carapace adventures too. He's not that used as a hero so I'd love to see him more. Maybe have him interact with the duo, with just LB, with just CN or even have him alone doing some mission. This guy is the perfect balance between those two and he's very wise so I'm sure we'd see very good conversations.
Kagami doing something that isn't Adrien or fencing would be nice too. Like, imagine her going on a walk home and thinking. Maybe she's listening to music and she suddenly finds someone, probably Marinette. Anyone but Adrien. And we get to see her process social interactions again, which I found very relatable in Ikari Gozen. Oh and I'd love to see her be conflicted because she wants to obey her mother but at the same time she has this rebellious wishes.
Alix and Chloé should be a must ahsjjdksmsmw. I'd LOVE seeing them interact. Maybe one day Chloé goes to the Art Club alone because Sabrina is busy and surprisingly, she only finds Alix, because the others went to search for something. And we just have this moment of them silently dissing each other until one starts talking about the past. It's been slightly hinted Chloé and Alix may have been friends at slme point, and they probably fell out. So I'd love some kind of comfrontation.
Maybe we could see something of Mylène? The daily things she does. Maybe her sending important things to her friends, organising manifestations, posting resources, researching... And she practising her speech abilities because she wants to inform people and be helpful. This show is only politically affiliated with ecologism so we'd probably see her daily routine caring for the planet and getting her friends into it too.
You know what I'd love? A heart-to-heart between Luka and Ivan. They must be close, and we know Ivan isn't the best at expressing his feelings with music but Luka is the total opposite. Maybe them writing music together and talking about their days or their instruments or their hobbies. Maybe Luka has some problem and Ivan is one of the only people he trusts to put down his chill, mature, front (I headcanon he tries to appear as having not many problems to better support Juleka and the people around him), and we could see Ivan advising him. What kind of adviser is Ivan?
Sabrina alone. Let's see her hobbies! Maybe she's secretly an Art Kid? We know she likes roleplaying. Maybe she likes writing too? Does she have pets? Is she a cat person? Maybe we could see her researching. She's an amazing researcher in my headcanon. What if we see she's actually investigating about Hawk Moth and secretly collaborating anonymously with Alya thru the LadyBlog? Oh and I bet Sabrina loves creating outfits, not really designing, just combining clothes. Idk she just gives me that vibe.
Max! What does Max do in his free time? He's surely gaming. Does he have gamer friends, online friends? Oh, better. Imagine him programming his own game as a personal project because he wants to test his own abilities. He going out to get inspired and walking down the streets. We could see him appreciating the world in a fun way —he probably knows a shit ton of random facts. And when he finishes his game, after testing a lot, he probably uses it to spend a fun evening with his friends too. Idk he seems like a very fun person to he around.
A short story on Kim going to a competition is something I'd love to see. He's been training a lot and he is super confident but his rivals are amazing too. Maybe he has some rival we're yet to meet? Maybe Ondine herself is not only his friend but his rival too? We could see Kim getting second and see how he reacts. Is he a bad loser, disappointed on himself or is he the supportive type who goes all "omg look at how fast you were!!!! Are you a merfolk???? Do you breath underwater???? You were so fast ahwjwkdjw"?
Juleka and Nath moments? Some time ago people loved the thought of them together but I think a friendship between them is better. They're both kind of shy (I'm thinking of Evillustrator!Nath, not Reverser!Nath tbh). What if they were each other's first friend? Maybe Nath got Juleka into modeling because he practised with her? "Jules please let me draw you I need a human" and Juleka answering y an ominous way "I'm not a human but ok", and eventually trying new clothes. Oh and we can see them talk about how they're kind of distanced right now but they still trust each other a lot and have this special connection.
Rose writing her songs. Where does she get the inspiration? Maybe we could see her in her room, a very pink room where she has an unicorn collection. Maybe she loves writing lyrical things. Does she write poemas? Rose gifting poemas to her friends would be so in character. Maybe see her writing a song about herself and her life? She is happy but we could hear her sing about her struggles (her disease, trying to help people but being unable, maybe she sometimes doubts her positivity thing and needs to give it some thought, etc but in the end she's sure she wants to make the day as bright as possible).
LILA'S DAY. WE NEED TO SEE LILA'S DAY. She's probably alone most of the day, as we've been hinted her mother is so busy. What does she do? Maybe she posts some happy, bright foto to Instagram and then we see her irl being bored as fuck. She just eats a bit and stays in her room. Does she keep track of her lies? She has to have a diary, for that I'm sure. Maybe we can see her writing in her diary? Her future plans or just her opinions on the people of her class. Does she like someone or is everyone boring to her? Maybe she sometimes feels bad about what she's doing? Please let us have sympathetic moments with Lila. Fucking Gabriel has them!!!!!
So yeah I think I covered everyone in the class + Luka and Kagami – Adrien and Marinette because they're the protagonists. I just want to see the secondary characters develop a little!!! We need to see more of them. Season 1 was fun because it showed us their individual personalities a lot.