[Western Crossover] Superpowered Girlfriend

[I'm moving to LOFTER! ID: Rose Theorem. I'll repost this story there, so follow me if you're interested.] Question: What is it like when your relationship isn't supported by your partner's family? I'm your friendly neighborhood New Yorker: Thanks for the invite. This question was practically made for me. My sweet and considerate girlfriend has a cold, ruthless older sister who shows up every time to warn me to stay away from her little sister. Her cold, ruthless older sister even threatened me: If you dare fall for my sister, I'll kill you. I know everything. I'm the Sword of Damocles hanging over your head every second of every day. At the time, I thought, Are you some kind of walking surveillance camera? Only at the end did I realize her sister hadn't lied or exaggerated. She really did know everything. Because they were the same person. A little scene: The little Spider was baffled. "Why join the X-Men? The Avengers are obviously better!" Dorothy fell silent. "...Professor X is so handsome. How could I not join?" The little Spider still wants to ask the magic mirror who the most handsome person in Dorothy's world is. * The heroine has multiple personalities. One of them is an antisocial personality and a villain-in-training. * Sometimes quiet as a mouse, sometimes picking fights with the whole world. * Her mutant powers draw on abilities from Pokemon's Psychic type.