Andromedan

Andromedans are allegedly real sapient extraterrestrial beings inhabiting constellation Andromeda. This species visited planet Earth in 1954 apparently.

Biology
Andromedan are either humanoid or energy beings. Since beings or things cannot be made of energy, akin to how they cannot be made of mass, the latter description is implausible. However, by "energy" beings some authors or alleged witnesses might actually be referring to plasma beings instead.

Most sources and pictures depict them as blue or violet.

History
According to some sources, the Andromedans form part of an interstellar federation. Their goals for planet Earth and humanity vary greatly, from removing all hostile extraterrestrial presence to promoting the use electric cars. However, they always seem to have good intentions and are protective of humankind.