The main character, his parents are a light novel artist and an eroge illustrator making his lifestyle of otakuism pretty much genetic. He learned the hardships of being an otaku after confessing to his childhood friend, where she denied him, just because he was an otaku. He was so depressed, that he dropped out of school and became a NEET for a year, before his parents gave him a choice, rejoin society or be disowned. Having little choice, he looked for a job. He found a fishy job for otaku and took it, opening the doors towards his future.
Genre Savvy: Of course, he had a lifetime of anime and manga to draw on.
Guile Hero: He has shown to be a good liar, when needed.
Heroic BSOD: Shinichi doesn't take it well when he turns out to be an invader to Eldant society after all, even if unwittingly. He goes back to being a shut-in until Miusel breaks him out of it.
I Know Mortal Kombat: He reacts to well to the magical alternative world due to reading so much fantasy
My God, What Have I Done?: A comedic example in episode 5, after teaching the kids about anime and manga. Then Fandom Rivalry is created much to his shock. A more serious case when he realizes that the government is using him, and that he is actually an invader.
Another one of the ambassadors from Japan, assigned to serve as both a bodyguard and an advisor for Shinchi. She's generally the realist to Shinchi's idealist, and a fujoshi.
Action Girl: In episode 3, once Shinichi gets her a knife hidden inside her bosom, she is able to free herself from the ropes the terrorists used. She then proceeds to single handedly stop almost every one of the terrorists.
Bad Ass: She doesn't seem like one at first glance, but when her combat training is required...
Beware the Nice Ones: She is normally easygoing. But if you threaten Shinichi, or take lewd pictures, beware...
Bunny-Ears Lawyer: She doesn't seem so at first. But we see she is obsessed with BL, yet is still a competent member of the JSDF.
Deadpan Snarker: She has the tendency to snark when Shinichi is staring at her breasts.
Disproportionate Retribution: Episode 6, when Elbia takes her special soccer ball. She tries to shoot Elbia, Shinichi even points out; she might hit the soccer ball. Minori doesn't care.
Flash Step: Her movements in fighting can tend to cause her to do this.
Pervert Revenge Mode: Subverted, in episode 10 Shinichi feels her breasts. While not happy, she does not touch him. (Not on screen anyway. He DOES sport a rather hand shaped red mark in a later scene.) Those peeping soldiers on the other hand...
Platonic Life Partners: Her and Shinchi, she has never shown any romantic emotions for him. But they are very close and spend most of their day together.
Scary Shiny Glasses: She does this occasionally, such as to the Japanese soldiers who were taking discreet pictures of the girls in episode 9.
Shipper on Deck: For Shinchi and Garius. When she first mentions this in episode 3, Garius, instead of denying it like Shinichi, blushes instead at the thought of it.
Trigger Happy: Has the tendency to use her gun to calm an argument.
Affably Evil: Comes up in episode 11, where he calmly explains his intent to subjugate Eldant society by monopolizing the supply of otaku culture, and cruelly pointing out to Shinichi that he was nothing more than an expendable tool of the Japanese government. Despite this, he maintains an amicable tone and bears no ill will towards Shinichi until the end of the episode, when Shinichi decides to Take a Third Option.
Cunning Linguist: He is able to save Shinichi's neck by convincing the queen that 'little girl' has positive connotation.
Just Following Orders: When attempts are made on Shinichi's life, Matoba seems to make empty excuses on behalf of Japan's government. However, he does help Shinichi goad the superior to threaten him within earshot of Petrarca, leaving the viewers to believe that despite Matoba's intentions, he ultimately falls under this trope.
Punch Clock Villain: He just works for the government, which is trying to taken over Eldant. He does actually like Shinichi
A half-elf maid assigned to help take care of Shinchi.
The Ace: Miusel has been said and proven to be exceptional in her ability to use magic. She is also incredibly competent at housework, and has shown to have absorbed the Japanese language at an exceptional pace. In episode 7, she learns how to make omelet rice - complete with a character drawing using ketchup - after seeing it just once at Akihabara.
Action Girl: She's actually a skilled mage. It turns out that the maids are actually an elite fighting force.
Apologises a Lot: She has apologized to Shinichi a lot, often when she feels that she may have overstepped her boundaries and is causing trouble for him.
Badass Adorable: Miusel may be just a cute maid now, but her elven heritage allows her to use powerful magic, and she's even a military veteran. She obliterates a squad of terrorists with a blast of wind in the next episode.
Because You Were Nice to Me: As a half elf, she got the worse treatment. Shinichi was the only person that treated her any real respect. So she fell in love with him.
Expository Hairstyle Change: She actually ties her twintail hairstyle to expose her elfin ears in later episodes. This happened after Shinichi stated he did not mind her ears being different.
Freakiness Shame: When Shinichi first spots her elf ears, he's taken aback by it. She immediately apologizes, thinking he'd be upset by it, as half-breeds like her are looked down upon. But he instead finds them quite attractive.
Hidden Buxom: It's surprising, but Miusel's actually quite stacked underneath that maid outfit of hers.
Madness Mantra: After finding out that Shinichi was staying at Petralka estate for the night. She completely loses it. It ends with her stirring a burnt pot muttering "I'm sorry, please wait a little longer."
Clingy Jealous Girl: Absolutely despises Miusel at first due to how close the latter seems to Shinichi. Made worse by the fact that she views the latter as a lowly peasant, so therefore shouldn't be getting preferential treatment by him, such as learning Japanese. In one example, when first reading a manga to the girls, Petralka deliberately has Miusel go make tea. She then proceeds to sit on his lap, claiming she couldn't see the manga very well from the side. She also gets irritated when Elbia first shows up, and how much of a defense he's putting up to spare her life.
Petrarka's cousin and the captain of her guard. He is initially incredulous about Shinchi's goals, but later warms up to him.
Ambiguously Gay: He blushes when Minori says he would be the uke in Shinichi x Garius pairing, he borrows a BL book from Minori later on and claims he doesn't "bat for both teams", and after Petrarca eats rice off of Shinichi's face, he follows suit.
Nice Guy: At one point, after being found by Shinichi in his room, the latter swings his fists wildly in a lame attempt to defend himself. Brooke then gives him a stick if Shinichi was inclined to beat him.
Scary Big Lizard: Invoked by Shinichi during his first few meetings since the latter doesn't have much experience with giant lizard men on Earth.