Second playthrough (and onwards) bonuses
Note - Contains spoilers.
Pelleas - You will be given the option to spare his life in Part 3, Chapter 13. Select that option, and he will automatically join during Part 4, Chapter 2 (Tibarn's group). He will also appear on the battlefield on Micaiah's side in Part 3, Endgame.
Lehran (Sephiran) - Deploy the Black Knight in Part 1, Engame and confront the Black Knight with Ike during Part 3, Chapter 7 (it is recommended that Ike has at least 27 Speed to avoid getting double-attack by the Black Knight, or he will probably otherwise die. It is also recommended that a flying unit, such as Haar, airlifts Ike out of the Black Knight's range afterwards). Provided that both of these conditions are met, you should trigger Ike's memory scene after Part 2, Engame F-2, and Micaiah will save Sephiran in time after he is defeated in Part 4, Engame F-4. He will join you automatically at the start of Part 4, Engmae F-5 with the Ashera Staff, under his true name, Lehran.
Other secrets unlocked:
Upon saving the two above mentioned characters, the storyline will alter slightly.
Some dialogue will be extended, such as Lekain's conversation with Sanaki at the beginning of Part 4, Engame F-1.
You will view more of Lehran's memory scenes throughout Part 4, Endgame.
Added by: Volke May 6th 2008, ID#1462