The only character I own who is so far named is Moriko. Italics will always be what Moriko wrote. Bold will always be Yusuke's thoughts. Regular type will be anything said aloud or observed 3rd person. Read on.

October 16, 1894; Human Realm

Dear Hiei,

I miss you already, and you have only been gone for three days. How pathetic is that? I
do not know how I will survive four months alone. Especially not knowing what you are
doing, or if you are even alive, because I know you will not write back; you are just not
like that. And you never did promise me you would tell me what you are doing when you
get back in February.

Well, I suppose all that is not entirely accurate; I will not be alone for four months. My
brother is coming back in November—I will never understand him. He is the
stereotypical heartless demon, yet he takes the time to visit his little sister—half-sister,
actually—three times a year. Is it just me or does that seem bizarre? Of course,
I have always suspected it was more to protect himself and his reputation. And no, I
cannot tell you who he is. We agreed that if I do not tell anyone we are related, he will
allow me to associate with anyone I please; so long as I do not tell him who in case it is
one of his enemies. I have explained this to you before, Hiei, and nothing has changed.
So do not even bother asking.

Although, I will never know for sure why he checks in. He claims it is to keep me from
being used by other demons to get to him, and part of me wants to believe him; believe
someone actually cares about me. That is also his reason for forcing me to stay in this
wretched realm. I so wish I could have come to Makai with you. Do you know how volatile
and disgusting the human race is? And that is not to mention the half-demons that
reside here. Which do you think it is, Hiei? I mean, the reason my brother checks in on
me.

Well, there's nothing else I wanted to say, except that I miss you more than I have
ever missed anyone. Do you miss me? I hope you do, it might make you come back to
me faster. Please, please write me back.

Your lonely forest child,
 Moriko

To keep things straight, Yusuke had decided to read the letters in chronological order. He wouldn't have done this if he hadn't noted that each was dated, the oldest being October 16, 1894; Human Realm. Human Realm? Yusuke thought. How could that be? Hiei hates humans, so why does he keep a case of letters from someone living in the Human Realm? That location generally means they're human, doesn't it?

Yusuke received his first shock in the first line. Who in their right mind would place the word dear directly in front of Hiei's name? Yusuke wondered. He then read on stopping now and again to think about what he had just read. He's the stereotypical heartless demon he read at one point and thought Ah, so this isn't from a human but from a half-demon or demon merely living in the human realm. Later when the writer was complaining about humans and half-demons, Yusuke deduced: She must be a full-blood demon, to harbor that much hate against humans and half-demons for no apparent reason. Especially considering she was willing to go to Makai with Hiei.

When he had finished the letter, Yusuke refolded it and placed it back in the box. He didn't think he could read another just yet. For some inexplicable reason, this person cared deeply about Hiei. Enough that she wanted to follow him to the Demon Realm, if only she could. Just trying to comprehend someone liking Hiei that much just about fried Yusuke's brain. He had to talk to Kurama. Immediately.

Ten minutes later, he was knocking on the door of the Minamino household. Luckily, Kurama was the one who answered. "Is Hiei here?" Yusuke asked. When Kurama nodded, he continued, "Then I can't talk to you here. In ten or fifteen minutes make up some excuse to visit me. It's urgent."

"It was you." Kurama breathed. "You're the one who stole Hiei's precious box."

Yusuke nodded. "That's what I need to talk to you about." He said. And then he left.

Thirty minutes later, Kurama arrived at Yusuke and Atsuko's house. Fortunately, Atsuko wasn't home. "What is so important that you would make me come all the way over here?" Kurama asked impatiently.

"The contents of that box." Yusuke replied, "I couldn't handle them on my own. They're letters, Kurama. Letters written in the 1890s, Human Realm. They're from some female demon—"

"I don't want to hear anymore," Kurama interrupted. "If you're going to snoop into Hiei's personal business, you'll have to do it alone. I don't want any part of it. He's my best friend, and if he doesn't want me to know something, then that's okay with me. I'm not going to go behind his back to find it. Heaven knows I've kept some secrets from him. Just one thing: what's her name? You said she was a demon; I might know who she is."

"Moriko. 'Forest child,' she calls herself." Yusuke replied.

Kurama blinked once, said "Thanks, I have to go now." And left, his brow furrowed so deeply his eyebrows met just above his nose.