Dewa Maresuke was a Human Starfleet Officer during the 24th century. He and Jeremiah Hayes had been friends since their academy days.

During the Dominion War, he commanded Task Force 621 with the USS Tyokai as his flagship. 

After Seff O'Rourke rescued the crew of the SS Gratzner, Maresuke congratulated him and then presented him with orders to return to Prophet's Landing immediately.

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