No, Ren, you DON”T understand. You know why you’re looking–Midori doesn’t. You’re feeling a sense of loss; Midori’s been programmed. 🙂
Well, yes and no. Whenever someone has lost someone, the most direct, immediate thing lost is their connection to the other person. It was there and now it’s not. On that level Ren can and does get it.
On the other hand, each relationship is unique, so no two people can fully understand what the other has lost. This is a fairly extreme case, since the person Midori has lost is… Midori, herself. She only remembers the last (what?) two or three days?
Aside from that, Grey and Midori both seem fully aware just how dangerous this situation could get. Grey asks ‘What if we don’t go along?’ but Midori, knowing she might be going on alone, asks ‘What are the coordinates?’ There’s a saying ‘fools rush in where angels fear to tread.’ Those fools usually have silly grins and say things like ‘wow, adventure, what fun!’ Midori, grim faced, has put knowledge ahead of danger. The fools may rush in, but I bet they’re following Midori’s footprints when they do.
True, on the most basic level, Ren can understand wanting to find something you’ve lost.
And yeah, Midori and Grey are indeed a bit split on this one… and neither wants to find themselves in the position of a fool D: