|Arrhenius in a crew groupshot|
Arrhenius was a climatologist working for Overwatch.
Arrhenius was one of the scientists stationed at Ecopoint: Antarctica, alongside Opara, Adams, MacReady, Mei,and Torres. Disaster struck the station when it was hit by a polar storm, damaging the station's solar array. Cut off from the outside world, the scientists were left stranded in the damaged facility. As their supplies dwindled, they entered cryostasis in a last-ditch effort to survive until a rescue attempt could be made. However, the pods malfunctioned, leaving Mei as the sole survivor of the incident.
- Arrhenius is a Swedish family name that means "river bank."
- She may have been named after Svante Arrhenius, a Swedish scientist who is renowned for his climate change research.