Gheb is the best fire emblem character. You get him in chapter 255xx which you have to access by using the warp portal on 255x after killing the boss, batta. In order to get to 255x you have to kill off dimaggio who joins you in chapter 255. He's really good as a unit, even better than seth. At the endgame he can oneshot most of the enemies. But if you're playing lunatic+++++ he can only oneround them. You should definitely get the s support with gheb and arden. It gives gheb +5 stat boosts in all stats and actually makes arden good and gives him 99 movement. But the one thing that makes gheb the best character in fire emblem is that he can use valflame. The final boss, bob the builder, wields falchion and durandal and those give him +99 in every stat so he oneshots all of your units, even gheb. In order to kill him you need to get to the super secret gaiden chapter, chapter 777xxxx. You need to unlock chapter 777x by reviving dimaggio with valkyrie staff and killing him off again. To unlock chapter 777xx you need to level up damas to level 999 and have him equip helswath. In order to unlock chapter 777xxx you need to silence all the mages in 777xx and make the boss kill all of them with his bolting tome by berserking him. Then to get to 777xxxx you need to level up eliwood, arvis, and shrek to level 999 and give arden the fire emblem, allowing him to use dark magic and then give him the loptyr tome. The boss of 777xxxx, leif, is actually really weak. But in the new update released by nintendo, leif has major fala blood and equips valflame. You can just silence him though and make him equip his iron sword. When you kill leif, you get valflame. Gheb with his major fala blood can equip it. But you still have to promote him to omega master paladin using the omega seal you get in chapter 776x that you access by beating thracia 776 for 776 times and then loading your thracia cartridge into the snes. Then you can kill the master ninja in the chapter who drops the omega seal so gheb can promote to omega master paladin and can actually use valflame. Valflame is super op in fire emblem, it gives +255 to every stat. With these bonuses gheb can actually oneshot bob the builder. He's the only one who can kill bob the builder, no other holy weapon gives the bonuses valflame does. And that is why gheb is the best fire emblem character.
Man, I am so bored.