If you're looking for manga similar to Reborn as a Space Mercenary: I Woke Up Piloting the Strongest Starship!, you might like these titles.
Marika is living the normal life of an average girl in space: attending her school's yacht club, keeping up with the latest trends, and working part time. One day can change a lot, however. Not only was her late father a notorious space pirate, he was also the Captain of the equally notorious Benten Maru! What's worse, she's just inherited his position and the pirate's life that comes with it.
Kato Marika is an ambitious seventeen-year-old student who is the president of the school's Space Yacht Club. Full of pep and enthusiasm, Marika takes charge, even if membership in the club is flagging. Her true calling, however, is something a bit more daring. For in her spare time, the spunky teen moonlights as the captain of the Bentenmaru, an infamous ship full of rough and tumble space pirates who strike fear and delight in the hearts of many!
Once, the scariest thing to Arihito Atobe was his workaholic boss, Kyouka Igarashi. Now, this ex-corporate slave faces a world where monster-filled labyrinths are the norm and teamwork is key to survival. While others are eager to charge headlong into battle, Arihito chooses to become a "rearguard": a class dedicated to helping allies from the back lines. The rearguard gig should be his ticket to avoid repeating his old life, but this opportunity may just shed new light on what it means to support one's partners and work together!
Planet Mahadoma was full of life with magic. Magic brings life to the no biological things and turns them into creatures. In the island of the imprisoned slaves, Cobra disguises as one of the slaves. Cobra was requested by Secret to find “The Scroll of Mara” which contained the source of magic. Cobra had stolen the scroll but in front of him appears Zita the turnkey, Mario the puppeteer and his puppet Xanadu and Lana the witch.
An invitation was sent from a mysterious man to the soldiers. The objective was to take back Shiba Castle. This was the castle that belonged to the Sheba clan and fell into the hands of the Chaos Army 20 years ago. The twelve soldiers that were assembled received along with the invitation, a playing card as if to resemble them to the spade knights who served the Shiba Castle. However, they were ambushed and the ones that were left were “Seven” and “Eight” the robots with two brains, “Jack” the one with the strongest shield, “Queen” the beautiful assassin and finally, Cobra who was holding the “Ace”. They were heading towards the port town of Gizara, in order to rescue “King” who was their only key to succeeding in sneaking into Shiba Castle.