Board Thread:Theories/@comment-26114137-20180804011001/@comment-3174069-20180822192551

Considering the fact that Ymir looked as male with the Jaw Titan, Pieck  looked as male with the Cart Titan and Willy's sister looked as male with the War Hammer Titan. Considering those facts, then if a male inherited the Female Titan, then the titan form would look female.