KanNao

KanNao is the het ship between Kanji Tatsumi and Naoto Shirogane from the Persona fandom.

Canon

 * Naoto requested Kanji go for a walk with her when they first met, leading Kanji to believe she was asking him out.
 * Kanji was initially conflicted about his feelings for her at the time, as he was under the impression she was a guy.
 * When the Investigation Team ran into Naoto during the school trip, Kanji looked away and hunched over to avoid awkward eye-contact.
 * When Naoto shows up on the Midnight Channel, Kanji is the first to call the protagonist in reaction, in spite of the role typically going to Yosuke.
 * Before the team goes into the TV after Naoto, Kanji is by far the most adamant about saving her.
 * Kanji stops the Investigation Team before they can prevent Naoto from rejecting her Shadow, insisting it's better for her to face her internal struggle at the expense of a boss fight.
 * After Naoto's rescue, Kanji scolds her for being so reckless and blushes at Rise's insinuations of how worried he was about her.
 * Kanji pushes Naoto to enter the Miss Yasogami Beauty Pageant so he can "clear up a few things," begging she do it to "make him a man."
 * During the awkward group date café, Kanji sheepishly admits that he likes mysterious girls who come across as strong, but are nice deep down. Yosuke quickly teases him about it sounds exactly like Naoto.
 * When Naoto refuses to come onstage for the swimsuit portion of the Miss Yasogami pageant, Kanji proudly backs her for trying her best (in addition to getting a bloody nose).
 * Kanji and Naoto can perform a fusion spell together in Persona 4 Golden called "Beauty and the Beast."
 * In the battle against Adachi in the anime, Kanji and Naoto team up to fight the first Reaper.
 * During the ski trip in Persona 4 Golden, Kanji attempts to teach Naoto how to ski.
 * During her ski lesson, Naoto accidentally lands on top of Kanji, to which they both get flustered. Naoto sheepishly apologizes, while Kanji faints with a nosebleed.
 * When Rise points out that Kanji clearly wants to hang out with Naoto by helping her on the ski trip, she easily gets a flustered rise out of him.
 * In Kanji's alternate route in Persona 4 Arena, he tells Naoto she doesn't need to use honorifics with his name, as he was under the impression he was dreaming.
 * At the alternate route's ending, Naoto sheepishly agrees to his request, to which Kanji panics from embarrassment.
 * In Dancing All Night, one of Nanako's responses to Kanji and Naoto dancing together is that she heard this is called being "lovey-dovey."

Fanon

 * The ship is also regularly portrayed as a slash or non-binary ship, based on differing headcanons of whether or not Naoto is actually transgender.
 * While the series typically leaves characters' romantic interests ambiguous to allow the protagonist to date whoever they choose, Naoto's behavior toward Kanji in his alternate Arena ending heavily implies that she has some distinct level of interest in him.
 * The necklace Naoto wears after the post-game time skip in Golden is commonly mistaken for Kanji's bullet necklace, which he no longer wears in his updated appearance.
 * Oftentimes, the ship is portrayed as beginning with the help of a misunderstanding or their friends getting sick of waiting and setting them up themselves, due to the awkward nature of the two.

Fan Fiction
Shirogane Naoto/Kanji Tatsumi tag on Archive of Our Own