Bella Fishbach

Bella was a Physicist researching the effects of radiation at Horizon Labs.

Working at Horizon Labs
Bella Fishbach was responsible for giving a tour to a number of students who came to visit Horizon Labs, including Peter Parker and Christian Cord.

Bella activated a radiation chamber, not realising that Christian was inside, was responsible for his transformation into Radian. She powered down the device, but not before Christian broke containment.