well she is still very young so i would think that she doesn't completely understand her own feelings. so i go with confused/innocent. i agree with mizuharamitzu....it appears that she deeply cares for both and doesn't know how to tell those feelings apart. or which is which. i sure wouldn't want to be in her shoes.
She's definitely innocent and confused. It's very easy to fall in love with two different people at the same time when you're young. Both Night and Soshi have qualities Riiko likes. She just has to figure out which one she needs to help complete her. And that's no easy task. @.@
She's confused and innocent she couldn't really be considered as greedy if she loves Knight that much. And Soushi's her best friend so I acn kinda understand why it's hard for her to choose between them.
Hopefully I'll never be put in a situation like hers