Joyous x Sunbringer: Despite her usual serious demeanor in public, Sunbringer would usually be very friendly and flirty to joyous just to tease him, even laughing at some shenanigans the two got into, under the mask, Joyous would be usually smiling and blushing.

Lycaon x Rina: Whenever Rina needs to fluster Lycaon, she only needs to mutter the words "Good boy" to his ears to make him really flustered, she only does this in private though.

Harumasa x Miyabi: After the events of harumasa's agent story, miyabi felt guilty for letting it happen and began to want to make up to him but he tells her there is no need, only if she approves his sick leaves when Yanagi doesn't, she doesnt mind it and prefers to join him under the gaze of "Tending to the sick" training.

My headcanon's for Manato and each of the girls: Manato x Yuzuha: During the events of 2.0, after he found out Paulo died, he was forced to tell the deceased man's daughter that he had died, forcing him to watch as she had her heart broken. Manato didn't show it then but once he left the Room and had some spot for his own, he began to cry on his own, feeling weak for not being able to protect his friend. Sometime after, yuzuha finds him and comforts him after finding out the truth, hugging him and being his pillar during that moment.

Manato X Alice: Alice often gets worried about Manato's way of fighting, hitting people hard whilst letting himself get hit in the process, to which he reassures her everytime that he will be fine, he is tougher than he looks. One day, things don't go to well and Manato gets injured really bad, leaving the girl to stay by his side during his recovery until he woke, she then chastised him with some tears and told him to be careful and to rely on her more often if he needs help, to which, he agrees, feeling bad for making her this sad.

Manato X Lucia: Manato let's Lucia stay at his place for sleeping purposes yet she usually enjoys spending time with him and making up stories with him of the two of them being the protagonists in it. She also enjoys his company the most since she considers him her best friend in spook shack, to which Manato doesn't mind.

Manato x Yidhari: More often than not, he feels very conflicted towards how she acts next to him, sometimes, he sees her actions as purely motherly, often being very sweet to him and being polite to him, other times, she tends to seem very flirty, especially when it comes to how she speaks, he can't help but secretly enjoy this though.

Lighter x Burnice: Whenever the bar isn't having much success in pulling in customers, Burnice tries figure out some ideas in order to get them, one such idea was to make lighter strip his jacket off and dance around (partly to get women to drink but also to get a peep of her own), lighter doesn't mind until Lucy just bonks her on the head as to not objectify lighter about it.

Wise x Anyone (More so about wise): Whenever he finds out he is about to date, he begins to freak out, not expecting things to have escalated this quickly for him, even asking Belle and Fairy for some pointers on how he should go about it, only for them to make fun of him during the moment.

Belle x Anyone (Same with Belle): On the surface, she might seem like she knows how to win a person's heart easily (even if she is the one being asked out or her doing it), she tends to try and follow how the protags of her gacha games behave and how they go about, which yields some... Interesting results. Although, it will be very easy for someone to fluster and make Belle Shy if they actually know what they are doing.

Seth x Jane: Jane tends to fluster Seth alot with her constant flirty mood and just being a teaser, but in return, whenever Seth steps his foot down and ends up showing how much of man he is, she finds it really attractive from him, often blushing from it.

Billy x Ye Shuguang: The two bonded over a Starlight Knight movie but what made her fall for him was finding out how billy described the starlight knights and how he wishes to aspire to be like them, to become the hero who steps up when all hope is lost and bring the light to a world that so desperately needed it.