From the anime Stellvia of the Universe, Jinrai Shirogane is a teacher at Stellvia's Space Academy and a commander. He cares greatly for his students and is willing to do anything to have their voices heard when they think otherwise. He has a great love for the sport Astroball which he played while he was a student back in the day.
Why I like him: His tough love works so well. He cares greatly for those around him but knows how and when to pull out all the stops
Why I hate him: His interactions with Ren (school nurse) are adorable yet fail. If you like someone just say it!
Overall: School in space. What could go wrong?