Fire Emblem: "And Never the Two Shall Meet", Part 2

Here's my next batch of FE non-supports. (I'd like to add one more to this set, but I didn't have enough solid ideas to write a fifth one at the moment. :P)

( A Mutual Understanding: Heath/Lowen )

( Bookworms: Erk/Canas )

( Tough Guys: Marcus/Wallace )

( Doesn't Hurt to Look: Sain/Lyn )