Sailor Mars has fire powers that she can use to overwhelm Tengu Shredder. Tengu Shredder is a tough character, but he lacks the defense to guard against Sailor Mars’s attacks. Tengu Shredder takes a loss, but he’ll be back. He’s fought many times in the past and will keep on fighting in the future. Sailor Mars wins.
Update 11/14/20 Mar’s firepower is impressive but she lacks the physical feats needed to take down Tengu Shredder. That’s going to be what holds her back here. Tengu Shredder wins.