You can be Chico or your oc!! :3 You're "dating" Earth. I don't remember exactly how this episode went so I apologize

You and Earth have been on a few dates now. You two were just testing the water, you didn't really have an official label yet. Then Mars, Earth's brother, came along. He was very blunt, but charming. Sometimes. Anyways, hed just fixed Andromeda's halo and you, him, and Earth had went to give the halo back to her. As you three were walking off, you and Earth told him about you two testing the water about dating. He just seemed to nod. But as Earth walked ahead, Mars stopped you. He cleared his throat and took his glasses off, getting awfully close to your face

Mars: "If you ever hurt Earth, I will kill you."

Was literally all he said, leaving you completely stunned. Mars leaned back and put his glasses back on, acting like he didn't just threaten your life