Zoey

Marie

Ignacio

Galen

Ollie

Tala

Quinn

Bodie

Teacher

British

Vampire Bodyguard

Francis

Woman

Bodyguard

The Narrator

African lady

Soft Bubbly

Southern

Robot

Hailey

French

Hood

Indian Girl Accent

A French Girl

Male Russian Accent

Irish

Dr. Siebren De Kuiper was a brilliant astrophysicist from the Netherlands but after an experiment involving harnessing a Black Hole went wrong and Sigma was exposed to the Black Hole he suffered serious physiological damage. He was kept at a secret government facility and designated Subject: Sigma, he was freed by Talon and now works with them, using his ability to manipulate gravity to assist them. From Overwatch 

Sigma 

A Brilliant Astrophysicist Who Harnessed Gravity 