Main prosecutor of AA5.

Personality: Simon is gruff and condescending with a dark sense of humor.  He uses his knowledge of psychology and generally dismissive personality to manipulate other people (most notably the judge).

Misc Facts: Simon was sent to prison on a murder charge, but because this is the world of Ace Attorney, he somehow still gets to be a prosecutor.  He often talks about his fellow inmates, and appears in court wearing handcuffs.

In the Japanese version, Simon refers to his opponents by picking out one kanji of their name. 

Friends and Family: Works with Detective Fulbright, and his sister is Aura Blackquill.  He also has a hawk, named Gin (Japanese version), who lives in the courthouse and acts as his partner when he's prosecuting.

Name Origin:
English: His surname is a reference to his hawk motif.

Japanese: The kanji in his surname mean "god of dusk." It's also a play on yugami, referring to his nickname in the AA law enforcement community, "a distortion of the law" (being a prisoner who prosecutes).  The kanji in his given name means "swift," though it shares a pronunciation with "blade," his weapon of choice.

Background: Seven years ago, Simon was convicted of murder (he confessed).