For those of you that beat Persona 4, what was your endgame Persona (i.e.:  The primary Persona you used in fighting the final boss)?  Mine was Satan, which I got through a fusion accident, complete with Mediarahan and Rakunda inherited from the Personas I fused.
 
And while I'm on subject, the first time I beat Persona 3, my endgame Persona was Horus.  I'm not sure how it happened, but after fusing and using gems to buy stat boosts for my Personas throughout the game, I ended up coming out at the end with a Horus that was surprisingly badass.

I used Trumpeter.  Charlie - Debilitate and other buffs, debuffs, Chie - Power Charge, God's Hand, Yosuke - Garudyne, Yukiko - Mediarahan, Agidyne. 

First time through was Shiva, plus Trumpeter for Debilitate.

I must be the only Persona player on the planet that didn't bother to fuse Trumpeter.

Trumpeter, Futsunushi and Ishtar.  I used Trumpeter for debuffs, Futsunushi for damage and Ishtar for healing (I was the healer for the party).

Yoshitsune. So broken. 

I think it was Trumpeter.  Took me 2 extra hours of fusing to make since i only had a 20% compendium at the true end boss.

Loki, actually. He was the only Persona I had with no weaknesses and a severe attack, but I switched to other guys for Debilitate and Mind Charge. 
 
In P3, however, I beat the game at level 90 with practically every single top-tier persona fused. I mostly used Helel and Messiah for the final fight, but after the boss charmed me to heal itself, I just said "Screw it" and used some Armageddon.

Izanagi, use nothing but buffs.

" Izanagi, use nothing but buffs. "

A pimped out Thor, mainly, if I remember right. I beat the finalfinal boss back in like March.

I used mainly Trumpeter and Loki, trumpeter for debilitate, Loki for defense up buffs and mad ice damage.

I used futsunishi for damage and team buff(matarakukaja), and switched to trumpeter for debilitate every three turns. The skill Ali Dance meant i only got hit about every other turn, so long as futsunishi was in.

Watching the Endurance Run near the end made me smile quite a bit. I thought my use of Trumpeter was a bit...overdone.... Apparently I was not using it enough. :P
 
I was using a combination of Trumpeter, Loki and...I think Thor. It's been a while since I beat the game.

" Loki, actually. He was the only Persona I had with no weaknesses and a severe attack, but I switched to other guys for Debilitate and Mind Charge.  "

I used Ishtar.  Magic Master, Salvation, and Matarukaja.  I went with a harem party.  Naoto mind charge + megidoloaned with the the Chakra ring on.  Chie did the usual power charge + god hand combo, and Yukiko attacked for once.  Switched out for Trumpeter's debilitate every 3 turns.  Of course, that's the first playthrough.  It was Yoshitsune all the way for NG+ games.

Trumpeter for Debilitate
Odin for Mind Charge and Panta Rhei
Korhyu (sp?) for healing

satan which i grinded to a good level with the usual debilitate from trumpeter, in persona i do believe my end persona was saturnus

I've never done a fusion with more than 3 Personas in Persona 4...  Didn't bother.  I don't remember the main Persona I used in the fight; I'm pretty sure one of them was Undine, though.
 
In Persona 3, the main Persona I used for Nyx was Loki, I believe.

an over leveled thor actually, i didn't fuse much so i never got the bigger better dudes

Trumpeter for debilitate and heat riser.  Occasionally, Isis or Ishtar (I forget which) because of the Salvation (heal all/all party).  Most of the time, my MC was buffing and debuffing as well as watching the health of the rest of the team.  I think I may have gotten a Zio attack in once or twice, so it was probably Ishtar that I switched to from Trumpeter during the battle.

Do you only make Persona 4 threads? Seriously.

" Do you only make Persona 4 threads? Seriously. "

" @CowMuffins said:

" Do you only make Persona 4 threads? Seriously. "

Do you only go in Persona 4 threads to look like a jerk? "

" @FluxWaveZ said:

" @CowMuffins said:

" Do you only make Persona 4 threads? Seriously. "

Do you only go in Persona 4 threads to look like a jerk? "

I suppose. "

" @CowMuffins said:

" @FluxWaveZ said:

" @CowMuffins said:

" Do you only make Persona 4 threads? Seriously. "

Do you only go in Persona 4 threads to look like a jerk? "

I suppose. "

So I don't think you're in a position to judge the OP on this regard.  Even though it's an untrue generalization.  "

" @FluxWaveZ said:

" @CowMuffins said:

" @FluxWaveZ said:

" @CowMuffins said:

" Do you only make Persona 4 threads? Seriously. "

Do you only go in Persona 4 threads to look like a jerk? "

I suppose. "

So I don't think you're in a position to judge the OP on this regard.  Even though it's an untrue generalization.  "

Ok fine, I'll direct the question to you. Then it won't be an untrue generalization. "

I think I used Trumpeter and Satan the first time, I forget now. I'm still messing around on my second playthrough, but I have a Yoshitsune, Auto-Mataru/Masuku Norn (fucked up the noise control enough that I didn't bother getting Repel Elec and the two Autos), Kohryu, and a 4 element Ma-dyne Scathach. Once I get enough cash to finish fusing all the Personas and start pulling my favs back out I'm going to call it a file.

I'd pretty much used Kohryu, and Trumpeter.

" Izanagi, use nothing but buffs. "

" Do you only make Persona 4 threads? Seriously. "

Loki, Thor, and Satan were my final go to guys.

Trumpeter with an insane Thor to back him up. Trumpeter was awesome for buffs/debuffs - Thor for the damage, that dude was a powerhouse after the fusion I did.

 first playthrough,I used Trumpeter.Then on new playthrough and beyond,I use Yoshitsune only and left all other 11 personae slot empty to increase the challenge.For healing,I use life stone,bead,bead chain,soma or antibiotic gel.

" @SmashedControllers: In 50 turns she casts something that does maximum almighty damage to everyone, so it's in your best interests to have something with Enduring Soul to counter that. Atlus has yet to design an extra boss that's actually fun to fight. "