Tetsukan Littner (テツカン・リットナー, Tetsukan Rittonā?) is a member of the control team for Dai-Gurren.
He is in charge of monitoring the condition of the ship. After the timeskip, he becomes a part of Leeron's science team. In the "alternate universe" scenes in Episode 26, Tetukan is seen sleeping in a bed with Cybela, implying that the two are involved in a relationship, or that one (or both) of them desire to be. In the epilogue, he is seen working under Viral's command alongside Cybela.
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