1.l'arachel by eirika's path
2.epriham by his path(srry if misspelled name)

charmanderguy is right, but dont recruit with eirika cuz you gotta spend money. L'Archel forces him to join.

the boy price or l archeal

I mean..he ask for "9,980" gold..i mean..wow

in Eirika's route: L'Arachel or Eirika (but you must spend a lot of money, 9,980g!)

in Ephraim's route: L'Arachel (of course...) or you can also use Ephraim (like I said, you
must spend a lot of money, 9,980g!)

I would reccomend using L'Arachel for either path.

Everybody's answers are correct and I have nothing left to say