Threnody used to be called Melody Jacobs. She used to live in Tennessee, until she lived in LA, until she didn't live anywhere, really. She doesn't remember any of this. She's a pleasant enough lady, sometimes young and twenty-something and sweet, sometimes not -- there are problems, you see. She used to do very bad things, and when you do very bad things, you have to learn to shut down certain parts of yourself.
But that doesn't matter now, because she's free.
POWERS, taken from wikipedia, will be drastically edited later wtf why is this character so absurdly overpowered:
* Threnody has a unique link to death, as is hinted at with her name. She, as an energy vampire is capable of sensing the certain necroplasmic energies that surround a person when they are near death or dying. She then absorbs this energy and uses it to either generate concussive blasts of energy or create zombies. Much like a vampire, Threnody was depicted as being enraptured by the scent of death and the "taste" of the energy. She once let a man die simply to enjoy the feeling it gave her.
* These Zombies she creates have been shown to have some sort of super-strength, considering they have torn through steel like it was paper. The zombies also seem to be able to keep going unless their head is taken off of their bodies. During Threnody's last few appearances, her zombies kept going after being shot at, and having their arms cut off; they simply healed or created new arms, and it was confirmed that healing the zombies took no energy from Threnody. Every time the zombies felt pain, or 'died', Threnody absorbed their energy.
* Threnody seemed able to not only absorb death energy and pain, but also natural energy, such as heat, electricity, lasers, and such. She was also shown absorbing the kinetic energy from bullets before they pierced her skin, so that they would just fall. She was also seen absorbing telekinetic energy, telepathic energy, and other sorts of psionic energy with great success. Her telepathic absorption is so great, that the combined efforts of Madelyne Pryor and Selene were not able to get past her defenses, and both failed to shut down her mind or control her.
* Towards her last few appearances, Threnody unlocked a new power that increased her potential, as well as helping her gain a greater understanding of her powers. She found that she is able to use the powers of any deceased superhuman. Apparently she is connected to and has access to a "portal" to the afterlife, and if someone with powers dies, she now has the ability to call upon them. Even if a person has died, and has been resurrected, part of them is apparently still in this portal/realm. So far she has used Storm's powers, Colossus' powers, and telepathic and telekinetic powers. She also seems to have an innate understanding of the power she calls upon.