Mycroft Holmes

Despite the hostility/rivalry the latter maintains toward him, Mycroft cares greatly for his brother, Sherlock, although his ways of watching out for his brother are unorthodox in the extreme. He is an almost entirely socially detached and calculating individual with an exceptional degree of self-control.

After he has first witnessed Sherlock and John working together, he tells his assistant to update Sherlock and John's surveillance status to level 3, implying that he already had governmental surveillance on Sherlock.[1] In tandem with his high intelligence, his self-confidence and mental resilience are almost inhuman, as he seems to be practically immune to even his own brother's probing. He is, however, not above petty or childish arguments with Sherlock, claiming that the latter's petty feud with him was "childish" and upsetting their mother, and he also argued with Sherlock in front of one of his peers and John in Buckingham Palace to force him to wear pants. Like Sherlock, Mycroft also smokes cigarettes albeit low-tar only, with him carrying a pack at any moment and able to enjoy chatting over smoking, usually without his parents finding out.

Mycroft is shown to be much more capable of faking or maintaining a degree normalcy than his brother, whereas Sherlock is ostracized for his behaviour, Mycroft is highly respected by his peers. He is thought to be very lonely and isolated. Sherlock has said this to him too, as even Sherlock has friends but Mycroft has none (that he considers friends at least). Mycroft believes himself to be "living in a world of goldfish", showing how he believes himself to be surrounded by people of much lower intelligence.

Abilities Genius-Level Intellect: Mycroft is immensely intelligent and possess incredible analytical and deduction abilities that surpass even his younger brother Sherlock, with Sherlock saying he has always been the "smart one" between them and, as children, even made Sherlock think he was a fool, and is only rivaled by Charles Augustus Magnussen. He is the second most intelligent human on Earth. However, while Mycroft's intellect was professionally referred to as remarkable, Deduction: Mycroft's powers of deduction are extremely high, surpassing even that of Sherlock, who is renowned to be the greatest detective in the world, and is beyond the standards of Charles Augustus Magnussen even though Mycroft relied on Magnussen most heavily. His superiority to Sherlock was shown when he discovered what had happened to a hiker by simply "glancing over the police reports".[3] At one point, he and Sherlock have a deduction battle and, as always, he wins.[6] Mycroft was also able to correct Sherlock's deduction of John and the lilo, by saying it was the sofa[5], and could perceive that Alex Garrideb was short-sighted but had corrective laser surgery, which Sherlock's deductions had missed, from simply looking at his clothes. Mental Resistance: Due to Mycroft's inhumanly intelligent mind, he possesses extremely strong mental resistance and, coupled with his confidence, he is practically immune to even Sherlock's mind probing Expert Deceiver: Though not a skill he enjoys or prefers using much, Mycroft proved to be an excellent deceptor, being able to successfully fool his parents of what truly happened to Eurus for years with ease. Multilingualism: Mycroft's tremendous intellectual aptitudes and geniuses makes him highly adept at learning new languages, evidenced when he went to save Sherlock after he was captured in Serbia. Mycroft quickly fully mastered Serbian in 2 hours and was able to speak it with enough fluency to fool Sherlock's captors completely with ease long enough to rescue his brother.

You are his girlfriend and there's a big age gap of twelve years between you. You are nineteen he's thirty-one