[Something about the letter does seem off, but she's not really sure how to distinguish what it is. It's his handwriting, but it seems almost rushed to the point of curtness. That isn't like him. Should she write back, or just go visit him directly? He may prefer to be alone right now. She debates for a long time before picking up her pen.]

Ventus,

It matters little how much aid you are able to render. If you wish to come, please do so. You know your presence is always welcome.

Is everything all right? Do you want me to come over?

~Rukia