Diablo II/Act II

Atma
Atma is the owner of the public house, who recently lost her husband and son to the monster Radament. She initiates the quest "Radament's Lair."

Drognan
Drognan sells caster weapons, potions, and scrolls. He initiates the quest "The Arcane Sanctuary."

Elzix
Elzix is a retired thief who sells you low-level weapons and armor and lets you gamble on his unidentified magic items.

Deckard Cain
Deckard Cain came with you from the Rogue Encampment to provide you information and to identify your magic items. He initiates the quest "The Horadric Staff" after you give him the Horadric Scroll.

Farah
Farah can heal you and sell you weapons, armor and arrows. She can also repair your damaged equipment.

Greiz
Greiz is the captain in charge of guarding Lut Gholein. He can hire out his Mercenaries for a small fee.

Geglash
Geglash is the town drunk, who gives you information about the problems facing Lut Gholein.

Jheryn
Jheryn is the leader of Lut Gholein, who has become overwhelmed by the demonic threats facing the city. He initiates the quest "The Seven Tombs."

Meshif
Once you complete Act II, Meshif can bring you to Kurast to begin Act III.

Warriv
Warriv can take you back to the Rogue Encampment should you wish to return.

Quests

 * 1) Radament's Lair
 * 2) The Horadric Staff
 * 3) The Tainted Sun
 * 4) The Arcane Sanctuary
 * 5) The Summoner
 * 6) The Seven Tombs