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Klein (クレイン) is an alumnus of Thors Military Academy's Class V ('03-'05).



Klein is a tall young man with dark hair and brown eyes. He wears the standard uniform for Thors commoner students, consisting of a green and white blazer, brown trousers, a white shirt and a red tie. As the captain of the swimming club, Klein is also often seen in his black and red swimming trunks.


Klein has a mature presence. He’s also quite humble and often carrying a smile. He seems to be a man of action when the time comes to act, especially when it comes to knowing what to do on a battlefield.

He is devoted to his mother, who raised him and his siblings following his father's death. He works hard to make her proud and pay her back.

Trails of Cold Steel I and II

Klein is from the countryside, only entering Thors because he got a scholarship. He works hard for the sake of his mother who raised him when their father died, showing her around the campus at the festival with enthusiasm. When he heard the news she had collapsed, he rushed home to see her immediately.

Klein is the captain of the Thors Military Academy Swimming Club. he is often seen encouraging all of its members to excel and do their best. He is skilled both when it comes to athletics and academic studies. He requests Rean's help with tutoring a small child, Emile. Klein is also responsible for assigning Monica to Laura and later remarks that it was the right decision.

During the October War, after escaping Thor’s Academy with the other students, Klein & Heibel had been doing their best to stay up to date on how the war’s going. Before long, they contacted Rean and Class VII about an airliner that was hijacked by jaegars around the Eisengard Range. They used civilian hostages, nobles included. Klein and Heibel swapped info before Klein acquired an orbal rifle. While the two snuck in through one way, Class VII went in another way to rescue the hostages. During the confrontation, Klein and Heibel took care of the foes on the bridge to gain control of the airliner; Klein took out the lookouts while the Jaegers were busy fighting Class VII.

After properly restraining the mercenaries, the Thors Students secured the safety of the remaining hostages before setting the airliner in route to Roer Airport, where the heroes handed the culprits to the RMP and Nortia Provincial Army. Klein and Heibel gave much credit to Class VII for they played only support roles. With the mission done, Klein and Heibel decided to join Class VII aboard the Courageous then continuing to fly solo, and would help Rean’s party out in the future. Klein took up the post of navigation officer on board the courageous, and he and Caspar are determined to make their families proud

After graduation, he made plans to enlist in the army.

Trails of Cold Steel III and IV

Klein graduated last-minute and joined the Imperial Army of Erebonia's Intelligence Division.[1] Klein states he is working with Beatrix during the Great War and is helping onboard the Ark Royal. He contacts Rean and Munk in a communications test.

Trails into Reverie

Klein makes a small vocal appearance as a subordinate of Lechter in the Intelligence division, working to uncover agents of an unknown allegiance in Crossbell, who had apparently started in September. Lechter tells him not to let the target get away, and hangs up on him.

Character Notes

Trails of Cold Steel

Klein Note (Sen).png Year 2 Class V (Swimming Club)
The eloquent captain of the Swimming Club. Always encouraging the club's members to excel.
Family Man
He's deeply devoted to his mother, who single-handedly raised him and his younger siblings after his father died.

Klein Note (Sen).png 2年 V組 【水泳部】

Trails of Cold Steel II

Klein Note (Sen).png Year 2 Class V (Swimming Club)
Dependable captain of the Swimming Club. Skilled in both academics and sports, and cares for his family back home.
Navigation Officer
He took up the post of navigation officer on board the Courageous and will support the ship in that capacity.
Familial Love
He and Casper agree to work hard aboard the Courageous to make their families proud.
Currently preparing to join the army. In the meantime, he's happy to be able to have a chance to help his mother.



  1. Trails of Cold Steel IV, Act 2: "Guiding Starlight", 08/20.