The head doctor of the Grey Surgical Clinic, and the victim of JFA case 2.
 

Personality: Grey is a shrewd physician deeply concerned with the reputation of his hospital. Seems a little spastic, though. He has a very poor bedside manner.

Misc Facts: He has bad luck when it comes to weather forecasts.

Friends and Family: Unknown

Name Origin:
English: Grey comes from the famous medical illustration books, "Grey's Anatomy" (which came before the show ever existed, just so you know). May also come from "Grey Turner's Sign," a kind of bruising around the abdomen that indicates pancreatitis. (thanks Liam!)

Japanese: His last name comes from the verb kirisaku, which means "to cut open."

French: Comes from the phrase J'ai pas la forme meaning "I'm not doing so well" or "I'm sick."

Background: A year ago, the reputation of Grey's Clinic suffered a huge blow when fourteen patients passed away due to a medical error. Though a certain nurse was suspected to have been responsible, she died soon after the accident in a car crash. Grey is still trying to repair his reputation and wants to summon the spirit of that nurse so that he can learn the truth and clear his own name.

Ini visits Kurain in JFA case 2, and acts as a witness.
 

Personality: Ini is a ditz - she spends a lot of her time sleeping or otherwise being spacey, and doesn't seem to know what's going on half the time.

Misc Facts: None.

Friends and Family: Ini is Mimi's younger sister.

Name Origin:
English: Comes from the children's rhyme "eenie meenie miney mo".

Japanese: Means "nose or throat" (like a nose and throat doctor).

French: Comes from inespéré meaning "miraculous."

Background:

A former nurse at Grey's Surgical Clinic, and an important part of JFA case 2.
 

Personality: Bitter and vengeful, though in her heart all she really wanted was to start her life over.

Misc Facts: None

Friends and Family: Ini's older sister.

Name Origin:
English: Comes from the children's rhyme "eenie meenie miney mo".

Japanese: Means "nose or ears."

French: Comes from Désespéré meaning "desperate."

Background:

Self-proclaimed director of the Hotti clinic who appears in JFA case 2. Is not actually a doctor.

Personality: The clinic director is always willing to examine a pretty girl. He also doesn't seem to have any qualms about breaking doctor-patient privilege, as he's eager to spread gossip and tell the secrets he's learned.

Misc Facts: Not a licensed doctor. Be careful!

He appears again in JFA case 4.

Friends and Family: None.

Name Origin:
English: Probably comes from "hottie", as in the women Dr. Hotti prefers to work with.

Japanese: Named after the Hotta Clinic, which may come from bottakuri, which means "will overcharge you."

French: Comes from ça chauffe meaning, "this is getting hot".

Background: None

The founder and icon of the Fey clan, who is referenced in several cases in the series.

Personality: Unknown.

Misc Facts: None

Friends and Family: Founder of the Fey clan.

Name Origin:
English: Picked so that the letters can be easily rearranged to "I am." Also said to come from the Buddha Amitābha.

Japanese: When the kanji for Kyouko are reversed it spells kodomo, which means "child." This is an important clue in more than one GS case.

Background: None