Of all the 31 characters on its roster, no Hero has had an introduction quite as terrifying as Siebren de Kuiper, also known as Sigma.
In the recent short introducing the character, de Kuiper is shown researching attempting to harness gravity. After being exposed to a black hole for mere seconds, he suffers serious psychological damage.
The video shows the scientist slowly deteriorate into madness, giving players a glimpse at what is to come.
Amanda Kenson (Mass Effect 2)
Like many other scientists in the series, Amanda Kenson is a brilliant mind. She is known for her groundbreaking discoveries regarding the origin of the Mass Relays.
In Mass Effect 2’s Arrival DLC, she plays a pivotal role, helping Shepard try to slow the impending Reaper invasion. Just like almost everyone else who is exposed to Reaper technology for too long, Kenson becomes Indoctronated, turning on Shepard, going mad in the process.