Tenkai Knights - Recommendations

• Vol: 2; Ch: 19
• 2002 - 2004

In the near-future on planet Earth, a world gone mad where never-ending war is a fact of life, Kirio is the coolest kid at school. Up in the sky, a giant robot is fighting a fleet of gunships, but the brilliant and distant Kirio is far from fazed - until the battling 'bot makes an unexpected landing in Kirio's front yard and rings the bell. But the worst threat for Kirio could be what stands on the other side of the door: an alien invader robot with the face of an adorable girl!

• Vol: 2; Ch: 11
• 2008

What if World War II had not been a battle between Axis and Allies, but between the human race and mysterious attacking aliens? This is the world of Strike Witches: Maidens in the Sky. The Earth has been invaded by a mysterious alien race known as the "Neuroi." Humanity is on the verge of annihilation and their only hope is a team of flying magical girls--the Strike Witches. Miyafuji Yoshika is a simple farm girl who dreams only of taking over her family's medical clinic. One fateful day, a Strike Witch falls out of the sky and lands right at her feet. Yoshika is a healer and wants nothing to do with warfare or violence, but this chance encounter will change her destiny forever!

• Ch: 27+
• 2019 - ?

A droid picked up an abandoned child and decided to raise it.

• Vol: 1; Ch: 8
• 1992

Earth is under attack. As giant monsters destroy the cities and alien warships swarm across the skies, 12-year-old Takuma Ippongi runs around the rubble trying to save himself and Koyori, his girlfriend. Takuma's character flaw that he's too hyper and has no self-control and always does everything too hard. When Koyori's sweater catches on fire, Takumi whacks her on the back to put it out, but he hits too hard and hurts her back. "I was just tryin' ta put out th' fires!" he apologizes. "You could've done it gently!" she says. "Why are you so reckless? You've got no self-control! You can't always use maximum force!"

• Vol: 3; Ch: 14
• 2012 - 2014

Six years ago, Tsukihiko was caught in an assassination attempt on a little girl, Sami, when he attempted to be her shield. This incident nearly killed him and the girl together, but the little girl was the daughter of an extremely powerful family. With its vast amount of resources, the family was able to keep both Tsukihiko and Sami alive by recreating both of their bodies with cyborg technology. This has forced Sami to permanently rely on wired connection to her life sustaining computer. On the other hand, Tsukihiko has become a cyborg "Knight," sworn to protect Sami from harms way.

• Vol: 3; Ch: 21
• 1965 - 1967

It’s a battle for the fate of Earth between a space invading army lead by the ominous being named Goa vs. Earth’s defender, Magma, the giant robot—and Mamoru, a news reporter’s son, that’s caught right in the middle. Can Mamoru team up with Magma to save the planet?  

• Vol: 1; Ch: 5
• 1983 - 1987

Iczer-One is awakened and escapes the Cthulhu spaceship just before it is taken over by Big Gold. Iczer-One crashes down on the planet Ishua with no memories and no knowledge about herself or her past. There, she is forced to fight against Magenta, one of the Cthulhu's commanders who is in charge of the Cthulhu's invasion force on this world.

• Vol: 2; Ch: 13
• 2012 - 2013

Meldina hates humans, and wants nothing to do with them. Since her parents' deaths, she has desired to live surrounded by machines, and everyone in town thinks she's a weirdo. One day, she meets a big machine that she names Machina and treats it as a friend. Her meeting Machina, as well as meeting a potential friend in a girl named Alisa, kicks off a series of events that bring to light dangerous secrets about herself and about her parents' deaths.

• Vol: 3
• 2003 - 2004

In the year 2197, mankind has developed a method of traveling light-years in a matter of seconds, by opening a passage to a parallel universe where matter can travel infinitely fast. These openings have given an alien force, called 'Ghouls', the means to enter our universe. After a brutal attack, a group of new pilots are called in to help with the fight. But can they survive the Captain's brutal training long enough to defeat the Ghouls and protect the station?

• Vol: 2; Ch: 9
• 2014

On the first day back after summer break, high-school student Aoba is attacked by a giant robot that appears out of the sky. As he's pursued through the city, his classmate Hina appears in a robot of her own. She rescues him, and tells him cryptically that "Dio is waiting for you," before she disappears. This begins Aoba's new life as the pilot of the Free Treaty Alliance against the Great Zogilia Republic.