First, I need to establish Bloomstenoke. Maybe it's a hidden city that's untouched by time, which fits the immortal aspect. The name sounds a bit like "bloom" and "ten oke," maybe referring to something that blooms and is ancient. The Immortal Five could be a group of individuals with unique traits or roles. Each should have a distinct name and ability to make them memorable. Let's think about archetypes: a guardian, a healer, a warrior, maybe someone with magical knowledge, and a leader figure?