Scalder was a female human doctor and scientist who served under the Galactic Empire during the early days of the Imperial Era. As the Head Medical Officer, she had many responsibilities at the Empire's secret facility on Wayland, Tantiss Base. Serving under Doctor Royce Hemlock, she was a part of the Empire's cloning program.
Dr. Scalder was an administrator, technician, and scientist who served the Galactic Empire at the secret Tantiss Base at Mount Tantiss on the planet Wayland. As the Head Medical Officer, Dr. Scalder oversaw the Empire's cloning procedures. The officer personally welcomed Nala Se to Tantiss after the Kaminoan's own cloning laboratories were decommissioned and promised the alien scientist that the Empire had high hopes for her future.
When Nala Se was replaced by Dr. Emerie Karr as the chief scientist of the program in the Tantiss vault, Dr. Scalder observed the Force-sensitive children that were kept there. She questioned Dr. Karr's decision to give the children more interaction than planned but conceded when Dr. Karr asserted her authority on her. Later, while observing the children, she noticed Omega was missing and personally went into the observation room and then into Omega's cell to investigate, but did not discover anything, left oblivious to Omega's planning to escape.
When the Bad Batch arrived at Wayland, they were quickly intercepted by V-wings and cannons as they made their approach. In the vault's observation deck, Scalder and her colleagues learned of the intrusion. Karr ordered to implement lockdown procedures in the vault and instructed Scalder to safeguard the children. Scalder retorted and told Karr her concern for the "specimens" was unwarranted.
Later, as Omega snuck through the pneumatic tube system, Scalder and a Tantiss medical droid arrived at the vault doors. The droid ordered the children, who had been tasked with stalling Scalder so Omega could return from her reconnaissance, to return to their rooms. As Scalder and the droid collected Sami's sample, Sami claimed she was hungry, but Scalder dismissed her concern. Scalder and the droid then went to Eva's cell. Eva told Scalder that she did not feel well. Scalder ordered the droid to run a diagnostic on her and assessed Eva to be fine before leaving her cell. As Scalder approached Omega's cell, Jax requested to go next, but Scalder told him to wait his turn. Omega returned to her cell just in time for her blood to be sampled. Scalder finished her test and departed the vault, unaware of Omega's actions.
As the Bad Batch continued their assault on Tantiss, Omega and the other children in the vault decided to reprogram a droid. Scalder noticed their activity and went down from the observation deck to investigate. She arrived and questioned Sami where the other inmates were. Sami replied they were with the medical droid. The other children arrived a moment late with the droid, raising Scalder's suspicion about the unscheduled scan. She demanded to know what they were up to. She scolded Doctor Karr saying she was too lenient, then ordered everyone back to their alcoves. However, she was incapacitated by the medical droid, who injected her with a sedative. The injured Scalder was later escorted from the vault by clone commandos and stormtroopers as Echo and Karr arrived at the scene. Hemlock intended to discipline Scalder for her misdemeanors.
Scalder was a human female who possessed bangs of long, dark brown hair which she kept in a bun, light skin, and brown eyes. She wore the white uniform of an Imperial scientist with a modified Kaminoan emblem on the sleeves as well as a pair of goggles fitted with a communication device.
Scalder first appeared in "Kamino Lost," the finale of the first season of Star Wars: The Bad Batch. She was voiced by actress Helen Sadler. The episode guide for the finale released on StarWars.com drew parallels between the medical officer and Dr. Pershing, a character introduced in the 2019 live-action series The Mandalorian. The guide also revealed concept art for the officer by Angela Chen that was dated to June 25, 2020.
Scalder was first named in the second season episode "Metamorphosis."