Best Shadowhunters Characters
This is just a list where you guys can put your opinions at. I didn't see one of these lists, so I thought 'Why not make one?'
Matthew Daddario portrays Alec very well, down to his subtle gestures and emotions. Alec goes through a lot of emotional and character development compared to most other characters, and for the most part of the season, he has the voice of reason. Not to also mention Malec.
Alec/Matthew and Malec are the only reasons for watching this show. Good story arc and best character development. He is loving, loyal, and trustworthy. Just the best.
He fights demons, protects his siblings, parabatai, other friends, and boyfriend, and runs the New York Institute. All this without angelic power.

Magnus is undoubtedly my favorite character ever, both in the books and the show. He's kind, wise, witty, generous, powerful, hardworking, beautiful, and bold. He is so utterly selfless.
Despite his age and experiences, he is also a child inside. He can be powerful but can also be vulnerable. He'll kill a dozen demons at once and will also fuss about a stain on his clothes. He'll demand to get his things done but will also sacrifice anything for his loved ones. All these various aspects in a single person are not even too much. He's my favorite character ever, among all books.
Also, Harry Shum Jr. did a great job portraying Magnus. From the grace to the looks, the dialogues, actions, and style, everything was perfect!

Isabelle is an amazing character. She's strong, independent, and Emeraude portrays Isabelle gracefully. Such a queen bee.
She's badass, independent, gorgeous, and knows what and how to do something. She's not stupid or cowardly like her brother Alec.
Honestly, she's the most relatable, and you just have to love her.

Raphael is so kind and caring towards his clan and the people whom he is closest to. It warms my heart. David is such a fantastic actor, and Raphael has had me sobbing many times!
An amazing character! I wish we got more backstory on him with Magnus and how he came to be. I loved his development and relationships with Izzy, Simon, and Rosa.
He is legitimately my favorite character! Such a loyal person, I love him so much.

His line of "How are we supposed to trust a gothic wannabe like him?" was probably the best line in the movie.
Strong character and just overall such a nice person. He's always been my favorite.
This guy, who is so funny and has a great personality, is the best. He has always been there for his friends, always selfless, smart, funny, and nice. My list goes by, 1-Simon / Isabelle 2-Luke, and 3-Alec

Clary Fray may have been annoying in the first season, but closer to Season 3 - 3b, she was so badass. She is now my favorite character!
Clary shows that girls can do anything! All girls are smart, beautiful, and strong in their own way! She's my favorite character in the books and the TV version all the way!
She is fantastic, but I do prefer her in the books. Rebellious, beautiful, smart, and strong!

Luke should be number 3. How is he this low down in the list? He is the Captain America of the Shadowhunter world!
Luke is the perfect father figure for Clary. He has always been there for Clary and Simon.
Jace is so hot, and to be honest, Dom Sherwood did a perfect job. I wouldn't imagine someone else being in love with Clary.
The Newcomers

Valentine isn't my favorite character, but the actor manages to make Valentine evil and deceiving, yet surprisingly likable in the alternate universe. I love how he's portrayed.

He's amazing! I think he's a very interesting character.
She has such an interesting background, the best in fact. I love how she is so brave and strong-willed and will sacrifice herself for a cause she believes in. It's a shame she was killed off, but I think her character developed well throughout the course of the show. If they reboot the show, I hope she will be revived.
Julian is the strongest Avenger. My heart goes out to him.
Henry is just so down to earth. You've got to love that inventor.
James Herondale is a very mysterious character. He has an endless number of secrets and does not portray even an ounce of emotion.
He is a very attractive character who has a lot of courage, intelligence, and strength.
Cristina Mendoza Rosales is a very benevolent character. Though she hides a lot of things, in her own way she has always been a support to everyone around her.
I think Matthew is a very loyal friend to James. He hides an endless number of emotions, including grief, and always portrays himself as stable and happy. His character drew me in.