koko_(bemaec) said:
ねぇレティ。　いつも迷惑かけてごめんね。甘えてばかりでごめんね。叱ってくれた後に必ずぎゅっと抱きしめてくれるのが嬉しいの。体の奥がポカポカするのが嬉しいの。
ねぇレティ。　またどこかに行っちゃうんだね。でもあたいは泣かないよ。ここが嫌でいなくなるんじゃないってこと知ってるから。また会えるって知ってるから。
ねぇレティ。　あたいはもっと強くなるんだ。他のみんなが寂しがっていたら、慰めてあげるんだ。だから次会うときは、いっぱいほめてね。大きくなったあたいを楽しみにしててね。
ねぇレティ。　なんて言えば伝わるかな。どれだけ思えば届くかな。大好きなレティ。あたいはいつまでも待ってるよ。暑い日もじめじめした日も我慢して、初雪が降るその日まで、あたいは笑顔で待ってるよ。

Translation:
Hey, Letty. Sorry for always causing trouble for you. Sorry for acting so spoiled. I always felt really warm and happy inside when you would give me a big hug after scolding me.
Hey, Letty. You're going away again, right? But I'm not going to cry. Because I know it's not because you don't like it here. I know I'll see you again.
Hey, Letty. I'm going to get stronger. I'm going to comfort people who are lonely. So next time we meet, you'll have to praise me a lot. I'll be waiting for it when I grow up.
Hey, Letty. What should I say to tell you what I'm thinking? I love you, Letty. I'll always be waiting for you. Enduring the hot and humid days until the first snow falls, I'll be waiting for you with a smile.

;_;

Ok that managed to bring tears to my eyes. Not quite sure if this isn't heart-warming as well as heart-breaking.

Damn, this piscture always makes me feel sad. Cirno trying to not worrying Letty, smiling while crying is just depressing.