Masaki Tenchi is the main character in the anime and manga series Tenchi Muyo!. He is a high school student who discovers that he is the descendant of a powerful space warrior, which leads to various adventures involving alien characters. Tenchi is known for his kind-hearted nature and strong sense of justice. Throughout the series, he interacts with several characters, including Ryoko, Ayeka, and Washu, who each have unique abilities and personalities, contributing to the show's blend of action, comedy, and romance.