Redjac

Redjac, also known as Beratis, Kesla, and Jack-the-Ripper was non-corporeal emotional parasite that survived for centuries by traveling between planets and feeding on the fear he created by murdering woman in a serial pattern.

He was responsible for the following murders on Earth and Mars

1888-1891 17 women London, United Kingdom

1932 7 women in Shanghai, Republic of China

1974 Five women in the city of Kiev, USSR and attempted to take the life of Roberta Lincoln in the city of East Berlin, East Germany

1997-1998 numerous women in Hogsmeade and London. Trapped in subspace for over a century.

2105: Eight women in the Martian colonies

2156: 10 murders in Heliopolis on Alpha Eridani II

In 2266 (as "Beratis") on Rigel IV

In 2267 (in the form of Hengist) on Argelius II

Canon referenced
Wolf in the Fold (TOS)

novels
Star Trek: The Eugenics Wars, the Rise and Fall of Khan Noonien Singh volume 1

fan fiction
It's Hour Come Round at Last

known hosts
Colin Creevey (It's Hour Come Round at Last)

numerous unnamed boys (It's Hour Come Round at Last)

Blaise Zabini (reanimated corpse) (It's Hour Come Round at Last)

Haidar Farouk (It's Hour Come Round at Last)

Hengist (Wolf in the Fold)