Materials Collection -style sketch of Sailor Methuselah. This is a character I came up with ages ago, but the design is new. Methuselah is the unofficial name for the extrasolar planet PSR B1620-26 b
. It orbits a pulsar star and a white dwarf star, and is around 12.7 billion years old. (the oldest planet known to date, and almost as old as the universe itself).
In my fancanon, Methuselah has a small population that is extremely long-lived (with the average lifespan in the millions of years). However, when someone on Methuselah dies, they are reincarnated (not always right away) and retain the memories of their past lives. These memories manifest themselves sometime around puberty, and when someone unlocks the memories of their past lives they have a coming of age ceremony where they invite people who were important to them in their past lives.
Sailor Methuselah is somewhat of an exception where if she dies, she is reincarnated almost immediately, and as the exact same person each time (no change in appearance or personality). If she always seems tired - it's because she is. Her soul has no time to rest between incarnations, and she doesn't have the freedom of not knowing who she is for a time after being reborn (since she's the same person each time, there's always someone to tell her who she is).
Her element is electromagnetism, which would make sense considering pulsar stars (like the one Methuselah orbits) are highly magnetized.