Aldnoah Zero: Rayet Areash

Rayet is one of the supporting characters and one of the Martians who were raised on Earth. Her personality was seemingly cold and emotionless but before being heavily emotionally scarred, she was originally a cheerful girl that loved her father. But after the previous First Earth-Mars War, her father was stranded on Earth. He and a few comrades carried out the assassination attempt on Princess Asseylum in exchange for the promise of extraction back to Mars and knighthood under the Vers Empire. She then witnessed and forced to watch Trillram, one of the Martian Knights and Barons under the Vers Empire, killed her father, Wolf Areash, and fellow conspirators to keep them quiet and, after Yuki rescued her, she swore vengeance on the Martians after her father's death. She then eventually becomes a member of Inaho's squad to defeat the Martians and to end the war. She also knows how Martian and Earth weaponry works when she explains how Inaho defends himself against the Argyre, an Kataphrakt mecha piloted by Vlad, one of the Orbital Knights. This shower scene is from episode 9 of season one.

There's one more piece of foot content I want to add in, this is also in the same episode. The girl on the left is Eddelrittuo and the one on the right is Princess Asseylum Vers Allusia.