( @Ash-has-a-One-Piece-problem I don't mind at all! and alrighty Exis, just remember you asked for this hellhole of info XD)
Ok, so this is 'general' info that is true about them, please feel free to ask any and all questions
-Each immortal is similar to humans in the way that they look like humans, and can be hurt to an extent as well as can feel pain. Age doesn't affect them though, but they do require food and water if they want to use their powers. (They can survive without food forever, but if they want control of their powers, they need to eat at least once a week.)
-Food is one way they're controlled, as the longer they've gone without eating the less of their powers they can control.
-The other is through their powers. Each immortal's powers are stored in a specific gem, and by keeping the gem away from the immortals, they can control them. The immortals can only use the basics of their power without the gems, and to use the full power they have to be physically touching the gem.
-It's physically painful for them not to have their gems, and it feels similar to a broken rib that won't heal to them.
-The gems can't break and the immortals can't die, even from the most serious of injuries. If someone tries to do something like cut their head off or gut them fully, their weapon will never succeed, and any other limb can regrow.
-Specific powers and what they're like varies wildly depending on the religion involved or the tales being told
-All of the names given to each of the immortals are only used in the case of human interaction, they usually call each other by the thing they control or by the name given to them by whoever is controlling them.
-Ages listed as well are just what someone could guess how old they are by their appearance
-The stones can be removed from their respective jewelry if needed but the jewelry is a personal preference for the immortals if they are allowed to have it like so.
And this is more 'specialized' info about each of the immortals
Life: The gem is a clear cut diamond, set in a silver necklace. These powers are in the hands of a young male (25) named Andre. He has curly brown hair, deep brown eyes, tanned skin and stands at about 5'11". Without the gem, Andre is only able to speed up the healing of non-lethal injuries. With the gem he also can heal most lethal injuries, can keep someone alive for several more minutes before they die, and can revive people (heavy limitations here)
Fire: The gem is a deep red ruby, set in a gold armband that sits on the upper arm. Fire is controlled by an equally fire like girl named Olivia (18). Wild ginger hair goes to her shoulders and she also has vivid green eyes. About 5'4". Without the stone, she's able to manipulate existing fire and flames and is immune to fire. With the gem, she also gains the ability to create fire in her hand from nothing, some control over wildfires and heat, and slight control over lava/magma
Light: The gem is a multicolored opal set in a silver bracelet. A tall willowy woman named Elina (28). She has deep brown skin, straight black hair that goes to her mid-back, and hazel eyes to go with her height of 6'1". Without the stone, she can manipulate where light shines, and where shadows also hit. With the stone, she gains the ability to focus any light into a beam of any size, change the color of something if she focuses on it and (Like a glowstick) give off light from herself
Water: The gem is a light blue sapphire set in a silver bracelet. Water is controlled by a young man (20) named Kyo. He has black hair, deep brown almond-shaped eyes, and pale skin, plus he's about 5'9". Without the stone, he can manipulate existing water and be mostly immune to freezing temps. With it, he can breathe underwater, control ice and snow, swim quite fast and even control the water in someone's blood (Limited power)
Energy: The gem is labradorite set in a gold necklace. A young man named Samuel controls energy (27) who's 6'0". He has deeply tanned skin, curly deep brown hair, and brown eyes. Without the stone, he can control where lightning will strike and is immune to being electrocuted. With it, he also gains the powers of creating electricity blasts on his own, transferring things like punches into energy for his own use, and messing with people's electrical signals in their brains (Limited)
Earth: the gem is peridot set in a gold bracelet. The wielder is a young woman named Lilly (24) who stands at 5'3". She has ice blue eyes and dirty blonde hair paired with pale skin. Without the stone, she can aid plants in growth and can move rocks and things With it, she can create full on earthquakes, communicate with animals, and speed up plants growth even faster.
Psychics: The gem is amethyst set in a gold necklace. The wielder is a young man named Isaac (23) who is about 5'7". He has hazel eyes, brown hair, and caramel skin. Without the stone, he can make very basic force fields and faint telekinetic powers. With the stone, he gains increased basic powers, mind control (Limitations) And the ability to learn about the past just through touching an object.
Shaping: The gem is rose quartz set in a silver necklace. it's wielded by a man named Dakota (30) who stands at 5'11". He has black hair, chocolate brown eyes, and tanned skin as well as almond-shaped eyes. Without the gem, he can grow very small claws and can understand almost any spoken language. With it, he can grow wings, tails, claws, fangs, fur, gills, etc at will, mess with people's dreams, and can push messages into the other eight's minds if they're close enough.
Death: The gem is Iolite set in a silver armband for the upper arm. The wielder is a young woman named Caligo (19) who stands at 5'7". She has straight black hair, hazel eyes, and pale skin. Without the gem, she can speed up the process of death or slow it down as well as inflict non-life-threatening injuries. With it she can inflict death on anyone (Limited), tell when people are sick and dying and can do more with her basic powers.