[Western Crossover] The Tech Assassin

Before she found the man with the metal arm, Elsa lived like a primitive human. But after the guy she'd claimed as her own mysteriously disappeared, Elsa decided to summon up the courage to go out and find him. And so Elsa arrived in modern society, a walking weapon of mass destruction "Why won't Twitter let me post?" "Why can't I get through on the phone?" "Is the weapon broken?" "Wi-Fi? The Wi-Fi's down, damn it!" "J? J? Did you block my butler again? Elsa, tone it down!" The male lead dragged along his completely immobile mechanical arm and chuckled. The CP is mouth-to-mouth. The heroine has bizarre abilities, and the author's imagination is broken. There are lots of original settings. Point out any mistakes, and feel free to discuss. I'm a sucker for that heartthrob! I'm a stickler for details, and I'll do my best to make the logic hold together. I don't know enough about life abroad, so some details will be vague. Warning: The inciting incident will be reframed in a more positive light, some characters will be protected, the twins' backstory will be changed... expect a happy ending for everyone. Theme: