oh you bet i do!! i'll limit it to the ones i've got published fics up for because some i've only written thus far in excerpts or in roleplays

one in particular is shuusaku dazai! his introduction chapter in "the hateful eight" is one of my favorite early chapters alongside his twin sister's (fumiko)! here's a little excerpt from it:

"Alright, I suppose if you won't talk to me of your own free will, I'll just have to make a bet with all of you, won't I?"

Shuusaku sighs, lifting his arms and tucking his hands behind his head. The metal coin in his hand — a foreign one, notably not Japanese, but not a normal foreign coin either, as it is heavy and gold and has a woman set in the front of it with a baby on her back wrapped in a cloth — presses reassuringly against the back of his head as he does.

When he looks back at the others, his eyes grow cold, though his voice remains high and upbeat.

"Just promise me you won't cry to whoever's paying for your Jordans about how much it sucks to lose when you inevitably do, okay? It's really a huuuuge buzzkill when I spend all this time and energy being nice enough to explain myself to the enemy, only to find out hours later I wasted my time. If you can't promise me that, I might just haf'ta kill you all… just like you were planning to do to me when I walked in here. Right?"

there are others, including makoto & hyakken fukuzawa, takeshi oda, and murasaki nakajima-akutagawa, but honestly i love writing for all of the hateful eight (murasaki & nobunori, yoshiko kunikida, conan edogawa poe, fumiko & shuusaku dazai, junichi fukuzawa, and takeshi oda). it's most fun to get into the headspace to write shuusaku tho because he's just so strange and offputting