Name: Robios Maximos
Race: Elfiel (Alien/Elf crossbreed)
Type: Humanoid Alien
Place of Birth: Emtar 7
Gender: Male
Age: Ageless, though appears no younger than 19 in its disguise form
Height: 5'4"
Weight: 103lbs
Eye Color: Reddish-brown, almost coppery
Skin Color: Porcelain white
Skin Texture: Smooth
Hair? Yes, fairly long and bedraggled looking as if just emerged from water
Hair Color: Ebony
Body Build: Light, frail
Cock Size: Roughly 21 inches full
# of Cocks: 1
Fighting Style: Doesn't fight, skulks about and ambushes victims
Motivation: Leeching sexual energy by means of his leech-like phallus for his own pleasure
Psychological Profile: Constantly searching and feeding like a sexual vampire. Robe can feed from any orifice on the female body, and with such versatility, his sexual attacks are random
Personality: Very straightforward, almost to a true extreme and lacking in any social grace whatsoever outside of lures
Sexual Oddities: Phallus drains sexual energy from victims and implants a seed when a victim is fully drained to allow for the replenishment of such energy
Human Disguise Form? Something like that, looks more elven and goes by the name of Rebecka but wears his hair down to disguise his pointed ears
Human Disguise Appearance: Takes the form of a young girl, seemingly a few months pregnant (serves as a cover for his seed implant), wearing a standard Shokushu uniform.
Clothing: Standard Shokushu uniform (when disguised) or merely a flowing, black robe with a dark cowl (when skulking)
Special Attributes: Quite experienced as a "lure", capable of gaining trust through a pheromone excreted by the leech-phallus when encountering prey. Prey will not become aroused, but will trust nearly all who speak to them for the duration of the lure
Distinguishing features: In his "humanoid" form, Robe looks like a teenage girl who seems to be a few months pregnant, seemingly this is his true form
Behavior: Likes to lure unsuspecting girls or ambush suspecting girls
Capabilities: Capable of laying a "seed" inside of a victim that replenishes their sexual energy nearly tenfold after his phallus drains their energy
Weaknesses: Must feed daily or risk death if exposed to direct moonlight
Likes: Feeding, women, challenging subjects
Dislikes: Resorting to violence in order to feed
History: Sent far from his home on Emtar 7 during a great famine on his homeworld, Robios was launched in a pod to scour the galaxy for suitable planetoids capable of sustaining their need for ero-energy. This energy derived from erotic impulses of both male and female genders of differing species, and as long as they could procreate, they had need for their energy. Most however didn't last long after encountering their weakness to the lunar cycles which drained them physically when they had not fed for so long. Such a disaster occurred when Robios crashed on Earth near an island compound, unable to struggle any further, he first encountered a lithe female bathing by moonlight.

Needless to say, Robios pounced and drained the girl repeatedly, sticking his phallus in many orifices and laying one too many seeds. Eventually, the girl succumbed to a mass generation of hormones and died shortly after. With her body spent by means of Robios's feeding lust, he found earth females to be quite satisfying to his unique palate. Thus, he decided to stay, skulking in the dark and avoiding many of the larger monsters (most who he deems to be natives) and the agents of ADD
Miscellaneous:

Interesting idea. I like how he has to attack daily.

I thought it interesting too. It gave me a better take on rather a human-looking character for a monster.