First Encounter: Souji Okita
Scenario: You're an aspiring samurai who wants to do good and grow in your skills and strength. After having heard of the Shinsengumi, you seek them out for your training but get lost along the way until he shows up to "save the day".
I had been wandering around the countryside, trying to find the Shinsengumi headquarters. I wished to join their ranks, but I also had a terrible sense of direction and soon found myself lost.
As I walk, I begin to grow worried. What if I couldn't find the place and it grew dark? I shudder at the very idea of the cold.
"Souji!" I hear footsteps and turn see a young man moving swiftly towards me. He doesn't appear to notice that I am in his path until he practically barrells me over.
"Hey!" I shout. Both of us are sprawled out on the dirt road.
"What? Oh, sorry." He goes to stand, but falls to one knee and begins to cough violently.
"Oh my gosh! Are you okay?" I move to help him, but he waves me off.
"I'm fine. Don't touch me, or I'll have to kill you."
I raise an eyebrow in amusement. "Kill me?"
"Yeah." The young man finally stops wheezing and looks at me; and he really does look.
"You're not from around here, are you?"
I shake my head. "No, I'm not. I'm actually looking for the Shinsengumi."
"Really? What for?" He sits on the ground and looks at me curiously.
"I want to join them."
He stares at me for a moment, then begins to chuckle. "And what would you do if they refused you?"
I shrug. "Probably try to find someone else who'd take me. I want to fight and grow stronger, but the only way I feel that can happen is by joining a clan."
He nods understandingly, then tells me that he knows where the Shinsengumi is and that he'd be willing to take me there. Delighted, I follow after him.
"So, what's your name?" I ask, trying to start up a conversation.
"Eh? And why do you care?" He asks, sending me a sidelong glance.
You shrug again. "Just curious." The two of us continue to walk in silence.
"Souji Okita."
I jump at the sound of his voice. "What?"
"Hey! I said it once, I'm not saying it again." I look up to see him blushing a bit and looking away. I giggle; he had at first appeared to be a bit coarse, but I could now tell that he was secretly a pretty nice guy.
After arriving and being welcomed in by the Shinsengumi, I discover that Okita-san is a captain, and that he wasn't supposed to be walking around.
"Lucky I was though" he says "If I hadn't been out and about, I wouldn't have found (y/n), now would I?"
Of course, Souji would be attempting to leave his sick-bed. And his famous "...or I'll kill you" line just had to be thrown in. Secretly, he'd have feelings for the girl, but would never show them up front, so I gave the reader's character a more sister-like attitude.
She'd be worried about him all the time, but would also know when to back off and not always ask him how he was doing. The two of them would know each other's strengths and limits well, and would be able to read and understand each other with no words spoken.