“I am just a hunter. I'll do anything as long as I get paid.”
—Warren to Catria in Mystery of the Emblem.
Warren (ウォレン Uoren, translated Wollen in Fire Emblem Museum) is a playable character from Fire Emblem: Mystery of the Emblem and its remake. He is a hunter from Macedon who joined with the rebel army to earn gold. He is informed by Catria of the reasons behind Rucke's coup against Minerva and he offers to join Marth's army. When the war is won, he returns to Macedon and continues living as a hunter.
Other than Castor, Warren is the only playable Hunter in Book 2 of Mystery of the Emblem. You obtain both Hunters quite early in the game(Chapter 2 for Warren and Chapter 4 for Castor), meaning that deciding between the two comes mostly down to stats rather than recruitment timing. Unfortunately, Warren is clearly the inferior choice and there is almost no reason to pick him over Castor.
Taking his starting level and stats into account, if you get him to the same level as Castor by Chapter 4, he will likely wind up statistically equal or inferior in everything but HP. His growth rates are very similar to Castor's save for one important difference: Warren has 10% Speed growth whereas Castor has 40%. This can be partially remedied by either giving him Starsphere Shards that increase Speed growth rates(preferably Aquarius, Libra, or Sagittarius), or giving him a Speed Ring or two. While most characters in Book 2 already have sufficient Speed growth to cap or nearly cap Speed by the late game, it may not be worth sacrificing some extra Speed gains for your more potent units in an attempt to simply fix Warren into being as good as Castor.
Unless you really like Warren and want to use him in particular, Castor is the superior choice that doesn't require the extra help that Warren does.
Bow - D
Warren's Speed growth is four times better than it is in the original Mystery of the Emblem. As a result, his primary weakness was eliminated and he makes for a much more formidable unit that no longer requires any special care to turn out well. Upon Promotion, he gains the ability to use swords, allowing him to fight at close range if needed.
Shin Monshō no Nazo ~Hikari to Kage no Eiyū~Edit
"Warren returned to Macedon and became a hunter once more, living peacefully in the forest."
- Warren is one of the potential love interests for the Avatar (Female) along with Wolf, Gordin, Horace, and Jeorge.
- Warren's portrait in Shin Monsho No Nazo could have been inspired by Darros' portrait, another character from the same game, since his pose is roughly similar to that of Darros'. It could be speculated that Darros' portrait was used as a basis for Warren.