Ryder has numerous opportunities to work with the angara, but two missions in particular will gain the cooperation of Evfra de Tershaav, the leader of the Angaran Resistance: Helping Havarl's Scientists and Stage a Rescue. Only one is required to progress the storyline, but both may be completed.
First Contact: The Angara[ | ]
You secured the trust of the angara by proving yourself an ally on both Voeld and Havarl.
You proved yourself an ally to the angara by supporting their research efforts on Havarl.
You proved yourself an ally to the angara by aiding their fight against the kett on Voeld.