Siegburn

Razel, is a reincarnated youth. In his previous life he was a lonely boy who spent his days playing video games. Then one day tragedy came into his life. 

It all ended for him, was what he thought, until he opened his eyes; to find a fantasy world, where science and magic go hand in hand. 

That could have been a joy, but that happiness was nipped in the bud, because he reincarnated as the eldest son of a poor family of barons without territory, and, above all, he is uglier than in his previous life. 

His tragic new life doesn't end there, as he woke up in the last video game he played. An otome game. But not just any otome game, it is one with an RPG theme so it is made up of strong and dangerous enemies.

He will have to live his new life as a background character and help from the shadows to the capture objectives and the protagonist to avoid the end of the world and especially, the cruel villainess.

Reincarnated in an Otome game as a background character

Brain (https://codegeass.fandom.com/wiki/Alexander)

A mysterious individual who follows the orders of a certain person.

His reasons are unknown, but he attacked the Arklight Empire and other nations to provoke them.

Luxor (https://onepunchman.fandom.com/wiki/Giant_Spaceship)

The flagship of ancient mankind that was damaged for several years.

Long ago it was found by the headmaster of the academy and kept silent after telling the palace about it.

A spaceship with a lot of destructive power.

Lilix (https://gundam.fandom.com/wiki/Magellan-class)

A ship with the same characteristics as the flagship Luxor, but on a smaller scale.

Victoria (https://gundam.fandom.com/wiki/RMV-1_Guntank_II)

First defensive unit of the Luxor ship.

Its function is the same as that of an antibody, to eliminate any threat that enters the interior of the ship.

Originally created to be babysitters for children.

Grappler (https://gundam.fandom.com/wiki/MDX-0003_Gundam_Schwarzette)

Second defensive unit of the Luxor ship.

Their job is to protect the ship at all costs.

They were originally used to collect flora samples.

Epic Fighters (https://macross.fandom.com/wiki/VF-25F_Messiah)

Third air defense line to protect the Luxor ship.

Before the war against the dragons they were used to spread fertilizer and explore the world.

Zapp (https://gundam.fandom.com/wiki/FA-78_Full_Armor_Gundam_(Thunderbolt_Ver.))

First offensive unit, an armed unit 25 meters tall.

It was created for war and killed many dragons in the great war.

Its creator was Professor Asimov who was a robot lover.

Elion and Ilion (https://fategrandorder.fandom.com/wiki/Wyvern_Evil)

Second offensive unit, an armed unit of special type, it was designed in the shape of a dragon to try to make it go unnoticed among the dragons.

It could never be successfully tested since Astraea's attack on humanity occurred.

Ixio (https://gundam.fandom.com/wiki/XGF-02_Gundam_Lfrith)

The last and third offensive unit. The maximum armed unit that was built at the present time.

Its capabilities are superior to the armed units of its time.

A real machine of destruction that can defeat the strongest dragoons.

Shibuya Takachiho (https://oregairu.fandom.com/wiki/Yoshiteru_Zaimokuza)

The human form of the reincarnated Fanoss.

A lover of schoolgirl-looking figures.

Though he denies it, he says he died exercising and magically ended up with his loli pillow in his hands before he died.

Seraphim Form (https://gbf.wiki/Gabriel_(Summon))

Emily's body has a physical transformation where she grows wings and her hair lengthens.

To achieve this transformation, she needed a reality check where her will is tested.

Apollonia Maximum (https://gbf.wiki/World_Ender)

The awakened form of the Sacred Sword Apollonia.

Its power is unleashed to such a degree that it can wipe out acres of forest with a single blow.

Rosenblat (https://gbf.wiki/Crew#Airships (Grandcypher))

The first ship of the Rosenblat class, created by Duke Fitzclarence as a gift to Rosenberg Household.

Rosenthal (https://gbf.wiki/Crew#Airships (Avenir))

The second ship of the Rosenblat class, created by Duke Fitzclarence as a gift to Rosenberg Household.

Yomi is a cursed sword that seeks to cut down any living being while Enma is a demonic sword which harbors the resentment of its wielder.

https://onepiece.fandom.com/wiki/Shusui

Yomi's handguard is shaped like a star while Enma has the moon, making a game between who is more terrifying.

https://onepiece.fandom.com/wiki/Enma

Phantasmagoria (https://gbf.wiki/Original_Sin)

Aldis' sword that allows him to create illusions.

Phantom Knight (https://reborn.fandom.com/wiki/Genkishi)

Aldis' spectral appearance by releasing the power of his dark crystal magic core in his sword and armor.

Terminology #2