Ruu is an alien baby from the Planet Otto, who can levitate and perform telekinesis on objects, and who develops a deep affection and love for Miyu and Kanata, likening them to his parents and often assisting and helping them. He uses his abilities at the most inappropriate times causing Miyu and Kanata great trouble. Although he is still only a baby, he can understand everyone perfectly. To keep the others from knowing the truth about Ruu's identity, he is referred to as Miyu's little brother (although Ruu will deny that and insist on calling Miyu "mama").

(Source: Wikipedia) 

Miyu is an 8th grade girl, whose parents have been hired by NASA. They take off to America leaving Miyu with Mr. Saionji. Later, Mr. Saionji decides to go on a 1 year long trip to India leaving Miyu alone with his son, Kanata. More complications rise when an Alien baby and his babysitter pet crashes/lands in their house. To make things worse, alien baby starts calling Miyu and Kanata Mom and Dad, also showing ESP power and floating around.
 
(Source: Anime News Network)

__Height:__ 154 cm  

[Profile (KenPro)](http://www.kenproduction.co.jp/talent/member.php?mem=w15) | [Blog](http://ameblo.jp/mikakanai/) | [Twitter](https://twitter.com/MIkAKANAI3018) | [Instagram](https://www.instagram.com/kanaimika3018/) | [Wiki (en)](https://en.wikipedia.org/wiki/Mika_Kanai) | [Wiki (jp)](https://ja.wikipedia.org/wiki/かないみか)

Daughter of voice actress [Kazue Tagami](https://anilist.co/staff/164196/) and film producer Akihisa Kanai. Married to voice actor [Koichi Yamadera](https://anilist.co/staff/95011) from 1993 to 2006.

She's a spanish voice actress. She also has worked in TV series, theater, films, etcetera.    Height: 170 cm  Weight: 54kg

[Instagram](https://www.instagram.com/yeo_minjeong/)

Miyu is an 8th grade student. Her parents went working in NASA and they left Miyu. For a moment, Miyu was sent to stay with her Uncle. The first day when Miyu arrive to her Uncle house, her uncle decide to go to India and left Miyu with his son, Kanata. First time, Miyu thought she will stay in her uncle house only with Kanata. But this no longer happen. Soon, there is an UFO landed in Miyu's uncle house. Inside the UFO, there is an cute baby, name Ruu and with his babysister, Wannya... (Source: AnimeNewsNetwork)

After Daa! Daa! Daa!, Ruu is now a cheerful youth living in his home, Planet Otto. Then, a confused girl named Miu arrives through a wormhole from Earth. Ruu joins up with her and promises to take her home. Unknown to Ruu, Miu is the daughter of the same people who took good care of him in his stay on Earth. 
(Source: MangaArt)