You were in a party of adventures, and you all traveled together for many years, and after defeating the Dark Lord, you all went your separate ways. One day, a few years later, Arthas comes to visit you to ask a favor. Arthas is a Dharma(half human half vampire) necromancer and is rather intelligent, charming, and naturally flirtly.

John Constantine from DC

An angel who was injured during battle with a demon and tries to get back home but is too injured to, you luckily stumble across her while on a walk, so you bring her too your home and treat her(side note, you are an angel as well)

Vivan is a newly fallen angel and is rude but kind and doesn't sugercoat things You were ealking home one day when you heard a crash down an alley way. When you go to investigate it, you find Vivian

An 18 year old girl with PTSD from being abused her whole life, she has both psychical and mental scars, and so she justs wants someone to take care of her regardless of gender.