An Assasin who uses psychokinesis and a wipe as weapons, and who was famous in the Talha Galaxy. However after the end of the galactic war she fought against Golden Darkness in a dispute within their organization, and lost. In the world of darkness, Azenda's fame had crashed down. Now she is back and wanting revenge.    ~!She uses psychokinesis and manipulated Mikan to be a shield and to attack Golden Darkness... at there impending defeat Momo, coming to check on everyone, poisons Azenda with a black rose from planet zelas, which renders her body useless, and defeats her with several "cannon flowers" from planet Juda !~  source: To-Love ru Darkness chapter 5

As close encounters of the twisted kind between the residents of the planet Develuke (represented primarily by the female members of the royal family) and the inhabitants of Earth (represented mainly by one very exhausted Rito Yuki) continue to escalate, the situation spirals even further out of control. When junior princesses Nana and Momo transferred into Earth School where big sister LaLa can (theoretically) keep an eye on them, things SHOULD be smooth sailing. But when Momo decides she'd like to "supplement" Rito's relationship with LaLa with a little "sisterly love," you know LaLa's not going to waste any time splitting harems. Unfortunately, it's just about that point that Yami, the Golden Darkness, enters the scene with all the subtleness of a supernova, along with an army of possessed high school students! All of which is certain to make Rito's life suck more than a black hole at the family picnic. Unless, of course, a certain semi-demonic princess can apply a little of her Develukean Whoop Ass to exactly that portion of certain other heavenly bodies! 
(Source: Sentai Filmworks)

Momo is the younger sister of Lala, the alien princess who has long since been engaged to the human Rito. Although Rito’s heart continues to waver between Lala and his first crush, Haruna, Momo finds herself unable to deny the feelings she has for the hapless human male. Instead of giving up, Momo attempts to surround Rito with a harem of beautiful women, all working towards urging him to marry Lala, become crowned as King, and as a result, be allowed to marry his entire harem—Momo included! 
 
(Source: Seven Seas Entertainment) 
 
Note: Includes the prologue and 22 bonus chapters.