Kenjiro Ohta functions as a radar operator aboard the Yamato, regularly detecting incoming missile threats during combat. His appearance features a portly physique and freckled complexion. Within the original series continuity, he exhibits a joking nature, notably feigning enjoyment of Yuki Mori's coffee as part of this behavior.

In the 2199/2202 reboot, his background deepens. Holding the rank of Ensign (Third-grade Space Lieutenant), he serves as the chief weather officer in the navigation division. Born in Osaka, his optimistic personality positions him as a mood-maker among the crew. His responsibilities include observing and reporting space weather conditions alongside trajectory data for the Yamato.

After the Gatlantis conflict, Ohta achieves career advancement. By 2205, he serves as Navigation Division Captain aboard the combat carrier Hyuga, holding the rank of First Lieutenant. This role entails leading the navigation division and operating the ship's controls, signifying a transition from his earlier portrayal as primarily comedic relief toward a more focused professional capacity, described as moving beyond being merely a "gluttonous mood maker."