Lucy is an alien girl who doesn't have much expression and doesn't have any friends. In the anime, she introduces herself to Takaki's class as 'Ruuko Kirei na Sora', which means 'beautiful sky.' She meets Takaki in the sixth episode of the anime, but we see her in an earlier episode without any dialog. She refers to herself as 'Ru', the name of her home planet and the beings on it, and to earth and earthlings as 'Uu'. She greets people by reaching for the sky and saying, 'Ru!' Himeyuri Sango in particular enjoys mimicking Lucy's greeting. Lucy has a cat that almost drowns in the sixth episode but it is saved with the help of Takaaki; Lucy summons a thunderbolt which splits a tree, forming a bridge which Takaaki crosses to lift the cat out of a raging river. Lucy terms this stray cat 'the Nya', saying that it is a special species that can enjoy the true taste of food, and like Ru, Nya is alone on Uu. Lucy likes to cook the Nya fish broiled over a charcoal clay pot, which according to her is the best cooking device available on Uu. Apparently a currency of Ru is matchsticks, one of which is enough to buy a whole rocket engine. Lucy irritates the cafeteria cook of Takaaki's school by attempting to treat Takaaki to the best meal the cook can prepare by paying the cook first one, then two matchsticks, however Lucy is somehow able to successfully purchase her charcoal clay pot and fish to br with matchsticks. Lucy says that on Ru, it is said that the only good Uu is a dead Uu, but Takaaki is a special Uu.
Tamo-san is Gintama's version of the real-life Japanese comedian Tamori-san.
Chaos is the king of the country of Tao. He has god-like powers and a fan made up of Sakura's memory feathers. He is actually completely made up of feathers.
Appears in "The Big Fish is Huge, Baby."
Setsuna is a Shinmeiryu swordswoman from Kyoto who was taken in by Eishun Konoe, Konoka's father and the leader of the Kyoto Mage Association. She is childhood friends with Konoka and her protector. Setsuna spends the beginning of the series being relatively cold to Konoka, wishing to protect her from the shadows due to not forgiving herself for being unable to save Konoka when she almost drowned when they were kids. She does eventually open up to Konoka after the Kyoto arc and begins calling her "Oujo-sama" and "Kono-chan". Setsuna's pactio, Sica Shishikushiro is a wakizashi which she can summon and multiply at will to strike targets like missiles. Due to her training she's also skilled in anti-demon arts and is the one who taught Negi how to create shikigami from paper. Setsuna is a hanyou like Koutaro, in particular a crow. She was expelled from her people because white wings are considered a bad omen, and it was implied by Evangeline that she is an albino using hair dye and contact lenses to appear human. A running gag within the series is that Setsuna and Konoka appear to have romantic feelings for one another, yet Setsuna will deny it whenever she and Konoka are stumbled upon in romantic situations or asked about her preference.
Sellon was a Neathian Character and a Major Antagonist in Bakugan: Mechtanium Surge. She was the leader of Team Sellon and a servant of Mag Mel. She has shown to be the third strongest Brawler in Bakugan Interspace. Sellon has a mysterious personality. She has a serious attitude towards brawling. She loves style and grace in battle and lives by honor. She has a hidden brutality that is rarely seen. However, beneath that cool exterior was a conniving puppet master who was manipulating the Brawlers into doing her bidding by finding and pointing out their insecurities. Her tactics seem to be extremely effective against Shun. She usually tried to talk to Anubias to keep him from chasing after Dan. Her bakugan is Ventus Spyron.
Two young sisters who took refuge at the Crimson Scholar's estate. Coming from a serf family of seven siblings, the sisters' other siblings died from hunger and disease. Due the harsh life of serfdom which their lord treated them like slaves, they escaped and hope to get a better life at the city. However, Chief Maid looks down on the sisters since their presence would bring trouble with the Crimson Scholar. Furthermore, she considers them "bugs" for allowing life harsh realities to control their fate rather than overcoming it and control their own lives as human beings and not thinking and planning their future. Upon asking the Chief Maid to teach them to become proper humans, they are taken unto her guard, working as assistant maids. Thanks to the education given to them, Big Sister Maid becomes knowledgeable about the different lives and social classes of human society while Little Sister Maid becomes an expert with food and drinks. Contrary to the knowledge of Hero and the others, they do not know the Crimson Scholar's secret.