It's actually kind of problematic even if ram actually can remember all the routes. It can slowing down your walking pace in group if all the members not convinced enough. And shirley is rarely talking. Or rather she can't do that? That's tough...
Both Kate and Emilyko are extremely smart, but Emilyko's airheadedness conceals it. Kate operates logically all the time, while Emilyko is great at spotting patterns and making quick decisions.
Emilyko even outsmarts Kate sometimes, due to Kate's more negative outlook blinding her to some existing options and Emilyko's refusal to give up.
@AdamHu: There's a link on the index page for the series. However, it only allows you to read so many chapters back from the most recent one, and as a result you will end up missing some chapters.