Ema Skye

Ema Skye is Phoenix's partner in the fifth Case of Phoenix Wright:  Ace Attorney and the main detective in Apollo Justice:  Ace Attorney. The reason for her being his partner is because Maya Fey had left the city to continue and complete her medium training. She is responsible for introducing "scientific investigation" to the Ace Attorney games, although it was not employed in the second or third game.

Background
One year before the first game in the series, Ema was waiting for her older sister Lana so they could go out for dinner. And that's where she encountered serial killer Joe Darke. She was about to be killed until Neil Marshall came to the rescue. She fell unconscious after pushing away Marshall, whom she thought was Darke, thus not knowing who she had shoved aside. When she woke up, Lana was cradling her in her arms.

After the SL-9 Incident, Ema decided to become a scientific investigator to examine evidence very closely so that her sister would not forge any.

Two years later, she and Phoenix set out to investigate Bruce Goodman's murder and manage to bring the old Lana back. She went to Europe on Lana's behalf to learn more about scientific investigation.

By the time of the new Apollo Justice game, Ema came back to the States and became a detective in charge of homicides at the precinct, just like Detective Dick Gumshoe was in the Phoenix Wright arc. She can't stand being teased by Klaver Gavin, but she does have a working relationship with him.