The Mutates:
Talon, aka Derek Maza - To Restore Amends, Perchance to Dream, Sacrifices Parts 1& 2, Turncoat, AMWT, TFA parts 1 & 2, Reprisals Part 3 -- The Rising part 2, The Battle Below, The Longest Day part 1, Odd Couples, The Darkest Hour part 2, Aftermath parts 1 and 2, SOSN, Seeds of Change. -- Of things to come, Thicker than Blood, Unions --
Maggie the Cat, aka Margaret Reed - Gaurdians, Sacrifices Parts 1 & 2, Turncoat, AMWT, TFA part 2 -- The Rising part 2, The Battle Below, The Longest Day part 1, Blood Moon, Odd Couples, The Darkest Hour part 2, Aftermath parts 1 and 2, SOSN, Seeds of Change. -- Of things to come, Transistions, Unions.
Claw, aka Theodore West - Gaurdians, Sacrifices Parts 1 & 2, Turncoart, AMWT, TFA parts 1 & 2, Reprisals Part 3-- The Rising part 2, The Battle Below, Blood Moon, Odd Couples, The Darkest Hour part 2, SOSN.
Fang, aka Steven Fischer - Sacrifices Part 1, Turncoat.
Saeko "Sharon" Nomura (and Family) - Gaurdians, Sacrifices Part 1 & 2, TFA parts 1 & 2 -- The Rising part 2, The Battle Below, The Longest Day part 1, Blood Moon, Odd Couples, The Darkest Hour part 2, SOSN, Seeds of Change.
(Family) - Hirosuke and Mariko Nomura - Gaurdians, Sacrifices Part 2. (Sharon's parents; they do not live in the Labyrinth.)
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The Clones:
Delilah - To Restore Amends, Gaurdians, AMWT, TFA parts 1 & 2, The Battle Below, Blood Moon, Odd Couples, The Darkest Hour part 2, SOSN, Seeds of Change. -- "The Council" parts 1-3, Unions.
The rest of the clones; Malibu by name in "To Restore Amends", Burbank by name in "Perchance to Dream", All of them in "Gaurdians", Malibu in "Sacrifices" Part 2, all in "AMWT", Hollywood in TFA parts 1 & 2 -- Hollywoode and Burbank by name in "The Battle Below", Brentwood in "The Waiting Game" and "Odd Couples", all four in "The Darkest Hour" part 2, SOSN, Seeds of Change. -- Unions.
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Humans:
Three young children are the start of Hudson's human students - a unnamed boy with a younger sister named Cary and an even younger boy. ("To Restore Amends", "Sacrifices" Part 1). Then Cary's brother gets a name in "Things Fall Apart" part 2 - Justin. The other boy is named in Season 2's "the Rising" part 2 - Bobby McSwain.
Mrs. Watkins - "Turncoat" - another teacher-type in the labyrinth, older woman who helps with the lessons.
Lara - woman in the Labyrinth who helped Maggie take several children (including Bobby and Jenny) out trick-or-treating during "The Rising" part 2. Also in "Odd Couples".
Jenny - Lara's daughter. One of four children who Lara and Maggie took out trick-or-treating during "The Rising" part 2.
Al - a small middle-aged man with a straggly brown beard. "The Darkest Hour" part 2. actually, I think he's canon in "Kingdom", the guy that Fang was trying to rough up.
Libby - a middle-aged woman, badly burned on her arm during "The Darkest Hour" part 2
Dan - dark-skinned man, another suriving Labyrinth protector in "The Darkest Hour" part 2
Tige and Joey - two of the Labyrinth protectors who did not surive, mentioned in "The Darkest Hour" part 2