Alm, Kliff, Zeke, and Deen for guys.
Mathilda, Celica and Delthea for girls.
I dunno why, but the first three lords of the series are my absolute favourites.
Kliff because he's so adorable. Zeke because... well, Zeke. and I love his attire. a lot. Deen because I love his hair, and Swordfighter bias, that too.
Mathilda for being the best Cavalier type character, aside from Zeke, and she looks really cool in this game too. Delthea for also being adorable.