Hei

Letter in Hebrew. Also means 5.

Described as a single letter in the Sepher Yetzirah, one of twelve.

God produced Heh, predominant in Speech, crowned, combined, and formed Aries in the world, Nisan in the year, and the right foot of man. (from the Sepher Yetzirah)

Second letter of the name of god (YHVH) - related to Briah - The Creative world, and to Water