Smile
Rukia wonders if it's okay to smile.
Rukia doesn't giggle, no -- she lets the rest of the world's girls keep that aspect of stuff. What stuff? you wonder, but Rukia doesn't wonder this because she doesn't need to, and when she wears a new dress it is not a sign of anything except that it is "proper" as she puts it, and it is "right" and "well, it's the human world and all," but it doesn't suit you as you stand, staring at a girl who doesn't giggle yet does so in certain circumstances, who doesn't draw well but does all the time, who believes her friends don't, no, can't, care for her and their utter persistence in saving her irritates her, but let's not get into that -- no, what she's thinking right now as she stands before you, as you stumble before her, bumping into the walls she's built to hide her heart, she's wondering if it's okay to smile just this once, not a fake smile to hide her true identity when in the human world as she does, but a true one, and you, who've known her for awhile but can never fathom the lengths she'd go to save you: indeed, her utter persistence in saving your life has come to its height, but you don't say anything because you know she'd never want you to in the first place.
So you acknowledge her and move on because she doesn't care for gallantry or glory, or perfection in its art form; modest, yes, and sometimes a bit crazy, but that's Rukia for you, you think solemnly, wonderingly -- that's Rukia for you.