Three Crowns

actually, I just want to be immortal

By the age of 8 billion years (3.5 billion years from now), the Sun's brightness will increase by 40% [22]. By that time, the conditions on Earth will be similar to the conditions on Venus today [23]: water will completely disappear from the planet's surface and evaporate into space [23]. This catastrophe will lead to the final destruction of all life on Earth.

In approximately 7.6-7.8 [28] [23] billion years, at the age of 12.2 billion years, the Sun's core will heat up so much that it will trigger the process of hydrogen burning in the surrounding shell [28]. This will lead to a violent expansion of the star's outer shells...
...Apparently, the expanding outer layers of the Sun at this time will reach the current orbit of the Earth. At the same time, studies show that even before this moment, the Sun's loss of more than 28% [23] of its mass will lead to the Earth moving to a more distant orbit from the Sun and, thus, avoiding absorption by the outer layers of solar plasma [29] [26]. Although studies in 2008 show that the Earth will most likely still be absorbed by the Sun due to tidal interactions with its outer shell [28].

and an all-powerful vampire who can do anything and lives forever.