#is hananene too since it have some basis on canon but is such a short part of this post i ain't tagging it

[mari-lair]

in the age swap au that the minobros interage/relacions with akane,yashiro,aoi, lemon, hanako,etc?

uyguyiyu that’s a lot of people to go over! I tried to keep it short, simplify every dynamic, but it still got long.

Teru likes how genuine and passionate Nene is, her daydreams and gushing amuse him. She makes his more childish side shine, listening attentively when she tells him prince charming daydreams and sharing his own wishes for vacation, though he is very condescending at times: There is no malice to it, but Nene can act very naive and Teru is one arrogant little brat.

Nene has a big crush on Kou, and she actively tries to woo him instead of admiring in silence, plenty of reasons why, but mostly these three:Kou doesn’t have “someone else he likes”, when he rejects people he kindly says that he isn’t interested. Kou is not the “school prince” he may be considered a hot guy in school but he isn’t put on a pedestal, and that makes him feel more human and ‘attainable’. Kou is super sweet and blunt with Nene, when she is down, he tries to cheer her up, and he is so genuinely confused when she feels insecure, telling Nene she has a cute smile and she looks prettier than Aoi when she is happy. She is down bad.

Kou has a soft spot for Nene, he thinks she is a very sweet girl with a bright smile, and is sad she will die soon. He really appreciates that she is friends with Teru, even if a lot of her actions confuse him (he has no idea she has a crush on him), and when she bluntly praises him, he gets shy/have no idea how to react.

Hanako hates her crush on Kou so much, but he can’t genuinely hate Kou, he is the closest thing to a friend Hanako had before Nene summoned him. He still grows passive-aggressive with Kou and super clingy with Nene when she gets too lovey-dovey.

Teru wants Hanako exorcised and Hanako is scared of Teru, they try to convince Nene to abandon the other constantly. Most of the time Nene go “Play nice or I’m not staying with either!!” so they tolerate each other's presence.

They get very competitive at games, and it takes a lot of time, but their mutual care for Nene, and the traumatizing realization they share a lot in common make them slowly go from “Enemies that will go out of their way to hit where it hurts and drive the other to tears” to “Rivals that don’t respect each other in the slightest but can easily fall into friendly banter. It is a mystery if they care about each other cause they would rather swallow needles than say anything positive about the other.”

After Teru got attached to Nene, he always runs to her class to greet her with a sweet smile and a “Hey, we should ditch Hanako today! ”. This habit makes him meet Aoi relatively quick. Once she is introduced as Nene’s best friend, he tries to convince Nene to hang out with Aoi instead of Hanako, sure if she is already nene’s friend she’ll help Teru keep her away from Hanako.

His attempts usually fail, and Nene drags him to the bathroom with Hanako, but on the occasion he can convince Nene that “today is such a beautiful day to waste cleaning bathrooms” Aoi follows them.

He gets a crush on Aoi after a week or less of hanging out, and he isn’t fully aware it's a crush so he doesn’t hide it very well: he is sweeter with Aoi than with Nene and he asks a lot of questions about her, it makes Nene want to cry cause she knows Teru have a crush and it makes her get into her depressed “haha, all the boys really love her, I must be a radish in comparison :´)” moods.

Aoi is unsure and a bit overwhelmed by Teru at first but she warms up to him with time, realizing he does say a lot of weird things, acting as if ghosts exist, but he is not as unpredictable as he appears, and his questions seem to be born out of simple curiosity, so she eventually chalks him as a ‘sweet kouhai’.

Teru avoids any of Aoi and Nene's love talks like it's the plague, and Aoi finds that amusing, assuming it's because Teru doesn't want to hear Nene go over his big brother's dreamy smile, not because Teru is emotionally constipated and doesn't want to talk about his feelings, which is unavoidable if he lingers.

Teru used to be huffy with Akane since he is a half supernatural whom Kou treat as fully human, (Teru tied Akane up when they first met and tried to show off to Kou, expecting him to be proud he defeated a school wonder, but instead he was scowled for bullying a senpai) and he feels awkward every time Akane declares his love for Aoi. Still, no matter how cringe he acts, Akane is nice to people, easy to tease, very observant, blunt, competent and yet easy to trick, which makes him so cool to Teru. He really wants to be his friend.

Even though Akane is older, and the student council president, Teru still bullies him: It is common knowledge at school that Akane has beef with a 14 years old. He mostly ignores Teru but he did almost snapped when Teru says he will try to get into the student council so they can play more often.

Kou doesn't interact much with Akane, just checks on him from time to time, a bit worried about him since he knows how hard it can be to see supernaturals in a world where everyone else is blind to it.

Both don’t really interact with Lemon. Though Lemon does vaguely think Teru is weird in a funny way and Kou seems like a cool dude.

Teru is overly attached to Kou, for a long time Kou was the only person he ever trusted. Kou is his cool big brother/ best friend/ caretaker all in one and whenever he gets lonely or has a problem it is an instinct to go to Kou. He put Kou on a pedestal while simultaneously being protective of him: He has noticed Kou’s hero complex, and he doesn’t want to be an added reason as to why Kou looks so tired, he doesn’t want to be just a ‘dead weight’ Kou takes care of.

When Kou says he is “so smart, you’re far better at this than when I was your age!” or “So strong! You took that big supernatural all on your own! I'm proud of you” Teru takes it to heart, so he is very arrogant.

Teru does his best with house chores that don't involve cooking, such as cleaning and babysitting Tiara, to help out but he is more confident he is of help when it comes to protecting Kou's back on patrol. When Kou is stressed by school exams he tries to understand what Kou is studying to help him as well (much to Kou’s surprise, despite their three years difference, when he is in the red and Teru spends the day trying very hard to go over his school books, he is usually able to grasp the basic and help simplify things.)

Teru is aware he is not as 'heroic' as Kou, and he grows more and more resentful of supernaturals the more Kou's attempt to understand them hurts his big brother. He is scared if they talk about his real view on their job Kou will be disappointed in him, or, on particularly bad days, consider Teru a bad person.

Kou is very protective and fond of Teru, and will exhaust himself to spoil him.

Kou is scared by the idea of not being needed. He is genuinely proud that Teru is a prodigy but feeling more and more lacking by the year: Teru stopped asking for his advice in exorcism or how to vacuum or how to use a washing machine, and he never needed Kou’s help with school.

Kou got a mini-crisis when Teru started spending time with Nene and Hanako or Aoi and Akane every day instead of with him. He is very happy his little bro isn’t so lonely anymore, but he is so used to Teru’s visits during his school break, it takes time to get used to not see him for a whole day and not immediately assume something is wrong and Teru must be in danger. He is also far too used to being the only person Teru trusts, and it does make him jumpy and hurt when Teru starts to hide some things from him, or go to his friends instead of Kou to vent.

More info on it can be found Here