The One of Many may join your party if you devour Okku at the end of Act I. In the furnace in the Death God's Vault, you can devour the priest who serves as the "One" for the many. Using Okku's husk, you can force the thousands of souls into the husk, and thus, you have it in your party.
It starts out as "Child", a rogue, but as you build influence, it can turn into the "Brute" which is a barbarian. Further, if it devours the Sleeper (or Gulk'aush) it can also turn into a warlock.
If you end the curse, but have a positive influence with One of Many, it will remain with you. If you are of the good alignment, you will force it to destroy itself. If you have negative influence, it will leave you, threatening you.
If you take Akachi's soul as your own, it will laugh, call you a fool, and run away back to the Prime.
If you slay Akachi, it will question your decision not to take power for yourself, but will follow you still
If you devour Akachi, it will be enthralled with your choice, saying that it is your loyal servent, now and forever.
One of Many can be found in the Furnace room where he joins you for the first time. Unlike other companions One of Many does not go to the Veil when you switch him out of your party. Instead he can be found behind the Temple of Kelemvor in the graveyard.
Storm of Zehir
One of Many can be found as an encounter in Storm of Zehir. Evil characters can feed it cohorts for XP. They may also attempt to kill it, ending its evil for good.
- In the mirror puzzle in the Thayan Academy, if you have One of Many stand on the dais, many wraiths will appear and attack the player.