Jamieson Nathaniel Thornheaven
25
The Unknown relative

portrayed by Maxence Danet-Fauvel

Nicole Gabriella Thornheaven
15
The Daughter of Nike

Portrayed by Mackenzie Foy & Lucy Hale

Jocelyn Fairchild-Morgenstern
42
The Mortal thief

Portrayed by Lena Headey

Clarissa (Clary) Adele Fray-Fairchild
15
Valentine's Daughter

Portrayed by Luca Hollestelle

Maryse Lightwood
44
The Head of the institute

Portrayed by Nicola Correia Damude

Alexander (Alec) Gideon Lightwood
18
The brooding Archer

Portrayed by Matthew Daddario

Isabelle (Izzy)  Sophia Lightwood
16
The Beautiful Badass

Portrayed by Emeraude Toubia

Johnathan (Jace)  Christopher Wayland
17
"The Best shadowhunter that ever lived"

Portrayed by Jamie Campbell Bower

Simon Lewis
15
The Nerd in love

Portrayed by Alberto Rosende

Maia Roberts
16
The she wolf

Portrayed by Alisha Wainwright

Magnus Bane
400
The Glitter King

Portrayed by Harry Shum Jr.

The Rafeal Santiago
70
The "I'm so done with everyone" Vampire

Portrayed by Tyler Posey or David Castro

Sally Jackson
32
The Goddess among mortals

Portrayed by Marisa Tomei

Perseus (Percy) Jackson
15
The Son of Poseidon

Portrayed by young Logan Lerman and Dylan O'brian

Annabeth Chase
15
The Daughter of Athena

Portrayed by Leah Jeffries and Alisha Boe

Nico Di Angelo
14
The Son of Hades

Portrayed by Finn Wolfhard

Thalia Grace
ⁱᵐᵐᵒʳᵗᵃˡ
The Daughter of Zeus

Portrayed by Kaya Scodelario

Jason Grace
16
The Son of Jupiter

Portrayed by Damian Hardung

Other include
The Gods and Goddesses as depicted
Paul Rudd as Paul Blofis
Luke Mitchell as Luke Castellen
Lola Flanery as Silena Beauregard
Sab Zada as Roxanne Amor
Dior goodjohn as Clarice La Roux
Ryan Potter as Ethan Nakamura
Sadie Sink as Rachel Elizabeth Dare
Marcel Ruiz as Léonidas Valdez
Maia Reficco as Piper McClean
Max Barczak as Will Solace
Hailee Seinfeld As Andy Blake
Gaten Matarazzo as Tyson
Aryan Simhadri as Grover underwood
Lena Condor as Esmeralda Faye
Dove Camron as Tatum Vine
Nick Sturniolo as Travis Stroll
Matt Sturniolo as Conner Stroll
Amanda Stenberg as Hazel Levesque
Boo boo Stewart as Frank Zhang
Luke Mitchell as Luke Castellan
Michael Fassbender as Valentine Morgenstern
Will Tudor as Johnathan Morganstern
Isaiah Mustafa as Luke Garroway
Claire Holt as Camille Belcourt 
Chai Hansen as Jordan Kyle
Taylor Hill as Tessa Gray
Sophia Walker as Catarina Loss
Sarah Hyland as The Seelie Queen
Anya Joy-Taylor as Jasmine Lovelace