I saw your Tanjiro headcanons, and I honestly believe that the Hashira (cough cough Tengen and Rengoku) can get him into a lee position pretty easily - Rengoku because Tanjiro's his Tsugoku and reminds him so much of Senjuro, and Tengen to get revenge on how Tanjiro didn't aknowledge him as a Hashira in the beginning. And I think as a lee, teasing is what does him in just as bad as the tickling.
Since you said in your Hashira hc that Tengen will baby talk his victims, he'd totally use it against Tanjiro, who has a love/hate relationship with it. On the one hand, it turns Tanjiro's brain into this goofy mush that makes him unable to fight back and blush really bad. On the other hand... it turns Tanjiro's brain into this goofy mush that makes him unable to fight back and blush really bad.
Rengoku would totally use Tanjiro's words against him as any older sibling would (the classic "don't stop", "don't! don't what? tickle me!", "i'm serious! Hello there 'serious!' I'm Kyojuro Rengoku, the Flame Hashira! It's a pleasure to meet you!")
And it all makes Tanjiro whine and laugh even more and it's just adorable 😭
aaahh!!! yes!! tengen and rengoku are the tickle monsters amongst the demon slayers and love to launch tickle attacks on tanjiro!! they’re honestly like his big brothers 🥰
rengoku has a special bond with tanjiro (try to change my mind but their brotherly bond is so cute!!!) rengoku tickles tanjiro in a similar way to how he tickles senjuro. rengoku has a certain mischievous look in his eyes whenever he’s about to tickle tanjiro and he catches on and pulls the “i know what you’re gonna do, rengoku san!! i know that look anywhere!! i’m an older brother!!” and rengoku acts all innocent before grabbing tanjiro and launching a tickle attack while asking “what’s so funny? i haven’t said anything! i must be very funny if you’re laughing so much!” he’s also big on using the classic “don’t!” “don’t what?” “tickle me!” sayings and tanjiro despite knowing the trick always falls for it. rengoku also enjoys pointing out how tanjiro is one of the more ticklish slayers he’s known and laughs whenever tanjiro whines about his face turning red. despite all of his whining, tanjiro doesn’t hate being tickled by rengoku and to make it up for a rather ruthless tickle attack, rengoku buys him whatever food he wants
tengen uzui on the other hand is like a crazy older brother who loves picking on the little brother. it actually took a while for them to have this brotherly bond due to their initial meeting but tanjiro always respected him. tickling tanjiro wasn’t an initial thought until tengen saw rengoku tickling him and noticed how close of a friendship they had for being a mentor and a mentee. he wanted that sort of bond with tanjiro as well and decided to playfully get revenge for their first meeting when tanjiro said he didn’t recognize him as a hashira. as it turns out, tanjiro reacted the same way he did whenever rengoku tickled him but tengen’s baby talk was what got him mildly annoyed. he uses the “don’t what?” “tickle me!” trick as well but he likes teasing tanjiro by saying only babies should be ticklish. this embarrasses and annoys tanjiro but he tolerates it despite all the whining he does. they’ve developed a strong bond as well but rengoku still has a better relationship with tanjiro. tengen is jealous but appreciates that tanjiro actually likes him and willingly tolerates his flashy teasing
side note: tengen has also tried to tickle zenitsu and inosuke but they weren’t as tolerant as tanjiro. tengen got a kick to the face and a bite from inosuke and eventually he tried to take tengen down. zenitsu on the other hand wasn’t having it whatsoever and pulled out some thunder breathing to escape. he flipped tengen off and cursed him before he ran away to cry to tanjiro about how tengen keeps bullying him and calling him a ticklish baby🤣
i loved these!! as always, feel free to always scream your hc’s to me! i love hearing them and enjoy responding!!