Dr. Kuseno

Dr. Kuseno (クセーノ博士, Kusēno Hakase) is a scientist of justice who transformed Genos into a cyborg.

Appearance
Kuseno is an elderly man with strange facial features. He has elongated ears, a large nose, thin light eyes, and a thin frame. Perhaps, the oddest feature of his body is his hair, which is cut in to a bowl and protrudes away from his head.

Personality
He acts very fatherly towards Genos, often expressing concern for him and providing wisdom from his own experience. He always reminds him to not be reckless all the time and that they are together in their battle. He somewhat worries about Genos's obsessive desire to destroy the cyborg that killed his family and often stresses this to Genos to a degree.

In his youth, he was a very justice-driven man who would do anything to achieve justice for mankind even it means doing reckless things. As a result, seeing Genos being nearly destroyed by powerful monsters due to his recklessness reminds him a lot of himself.

He is a very selfless man since he willing to sacrifice his sleep and rest in his senior age to work tirelessly to give Genos the best weapons and upgrades to help mankind.

History
Four years ago, Dr. Kuseno passed Genos' destroyed hometown, pursuing the mad cyborg who rampaged it. However, he took Genos with him, who begged to transform into a Cyborg. Dr. Kuseno agreed, and modified him into a cyborg. He was promised by Genos that he would find the mad cyborg and destroy him.

Paradise Group Arc
Dr. Kuseno is seen developing parts for Genos, listening to his admiration for Saitama, wanting to surpass his powers. After hearing this, Dr. Kuseno noted he developed new parts for Genos and would be able to become stronger than Saitama.

Garou Introduction Arc
After defeating G4, Genos went to him and brought some of its parts. Amazed by what the latter has brought, Genos expresses his desire to become stronger and wants to use the parts if possible. Dr. Kuseno further states that Genos' master has given Genos a very reckless goal and asks whether Genos can bring Saitama the next time Genos comes, expressing his concern for the young cyborg, he also asks him about the current whereabouts of the cyborg that they're seeking. Genos replies nothing but expresses his hatred and would want to destroy it. Seeing this, Dr. Kuseno reminds him that he is not alone in his fight and not to be reckless.

Monster Association Arc
When Genos was defeated by Gouketsu, Dr. Kuseno spent a whole night fixing Genos' body. Genos is very grateful for his work and Dr. Kuseno noted that thanks to Genos, many new ideas and improvements came and made simple changes in Genos' body that made him stronger. He then warns Genos to be careful and not to be reckless like he was in the past and decided to get some rest.

The Sisters Who Have Too Many Things Happening
Dr. Kuseno is visited by Genos and was asked for psychic augmentation, to which the doctor denied, since it's not possible. He later remarked by how bothered Genos was for not being able to fulfill Saitama's task.

Intelligence
Genius Intellect: Dr. Kuseno possesses a great intellect, having created Genos' cyborg body on his own. He is also responsible for the various repairs and improvements of Genos' cyborg body during the story.

Equipment
Body Recovery Drones:  Dr. Kuseno's drones that are mainly used to recover Genos's body parts and assist Genos when he is unable to move. It is also shown that the drone is equipped with a gatling gun at the end of its tail.

Trivia

 * The "kuse" in Kuseno sounds exactly like "kusee" (くせー) an impolite form of "kusai" (臭い) that means "stinky" while the "no" has no direct translation (most likely the common Japanese name ending 野 meaning "field").