Ike, Shinon, Gathrie, & Titania take care of some Pirates terrorizing a nearby village. During the battle a Pegasus Knight named Marcia arrives & is attacked by the Pirates.
Of the 4 members of my group, only Ike is a permanent unit, so for the most part this is a solo Ike mission. When Marcia shows up, if Ike talks to her she will fly away, but return a few chapters later to join your group, Since she is gonna be the only flying unit you'll have for about half the game, I suggest talking to her.