Episode II of the Final Fantasy IV sequel switches protagonists from Cecil’s son, Ceodore, to an even more grown up Rydia. Her tale takes place in the Underworld where the summoner encounters familiar characters like King Giott and brand new party members like Luca, the first dwarf on the team. Luca learned how to maintain airships from Cid and retains Cid’s Peep skill (shiraberu). Luca also has the ability to throw items like Edge, which will probably come in handy when the group fights Trapdoors in the Sealed Cave.
While we might not get to play Final Fantasy IV: The After for a long time, you can see how the main characters look post-Big Whale by browsing through the character page on the official site. Don’t worry it’s entirely in English.