Emma Honeywell II (referred to as Emmy) is the daughter of Emma Honeywell. Not much is known about her past, except that many years before the game, Emma sent her off to a journey around the continents, as is traditional in the Honeywell Clan: this is considered her rite of passage into adulthood. She becomes a playable character when she joins the generals of Athlum.
Spoiler warning: This section may contain information that could spoil the story line or displays in depth quest or fight details.
Before she becomes playable, she appears in all but one of the cities that can be visited, having a new conversation every time. Rush mistakes her for Emma the first time they meet, calling her "Old Woman". Although Emmy becomes furious at the statement, she gradually eases up if talked to in multiple cities. Her name remains a mystery until the very last dialogue, where she introduces herself as "Emmy". She can only be talked to once in each town, she will disappear afterwards (the order of the towns does not matter). This can only be done before the meeting in Nagapur starts, after that she will not appear in any more towns. For all list check dialogues.
After Emma is killed by The Conqueror during the battle at The Nest of Eagles, Emmy returns to Athlum to take her mother's place as one of the four Generals of Athlum. How she knew of her mother's passing is not known, though it may have been coincidental. It is also possible that she has finished her journey. Earlier, at the beginning of the quest Bravery and Loyalty Emma is seen gazing into the distance in Athlum's Town Square (the same spot where Emmy later gives the quest The Fated One). During the dialogue, Emma refers to someone she's waiting for at that spot, and asks Rush to be there for her if she can not. Although no names are mentioned, this is a clear reference to Emmy, and it can explain her return to Athlum at the end of her journey.