Nifa appears to be a dedicated soldier, flying into action the moment her superior orders it despite the risk to herself. She is firm to the orders of her squad leader and dedicated to the mission of defeating the Titans. However, despite her deep care for humanity, Nifa still feels compassion and sympathy for those below her, shown when she worried for Conny Springer who did not yet know that his friends were the enemy.
After Hange's squad rescues group of Scout Regiment recruits at Utgard Castle, Nifa is present when they return to Wall Rose. Upon ascending to the top of the Wall, Hange leaves Ymir, who was heavily injured at the castle, in Nifa's care.After the appearance of the Colossal and Armored Titan, Nifa helps tend to the soldiers on top of the Wall, scalded by the Colossal Titan's steam. She speaks with the worried Conny Springer and Historia Reiss, before leaving the Wall to engage the Armored Titan as part of Hange's squad.
Nifa observes the battle, encouraging Eren in his fight against the Armored Titan, seemingly near defeat. However, the Colossal Titan falls off the Wall, dealing a devastating blow to the soldiers below, and knocking Nifa out.
Nifa remains unconscious, resting on top of the Wall, whilst the plan to rescue Eren from the traitors is formed.
- Isayama has stated that Nifa and Armin Arlelt are likely aware of their resemblance in looks with each other because it is often mentioned by others.
- In a Q&A with FRAU Magazine, Isayama stated that Nifa is the most stylish member of the Scout Regiment.