Alexander II (Александр II) was the emperor of Russia, King of Poland and Grand Duke of Finland.
Alexander II is a middle-aged man with heavy outlines on his face, balding head with hair that sticks out at the side of his ears and a beard. He also wears a regal military uniform adorned with many decorations.
Not much is known about Alexander II's personality, however he was seen reacting in horror when Wilk threw a bag of explosives into his carriage.
In 1881, Alexander II was doing a roll call in Saint Petersburg, when a fifteen year old Kiroranke attempted to throw a bag of explosives into his carriage but missed and hit one of his horses. However, Wilk managed to pick up the bag and successfully threw it into the carriage as Alexander II could only stare at him in shock before being killed by the explosion.
Though Alexander II is long dead by the current time, his death became the motive for the Russian government to issue bounties for Kiroranke and Wilk, both of whom were directly involved in the assassination and managed to escape with their lives.
Alexander II is based on his real life counterpart Alexander II of Russia although circumstances surrounding his death are different, such as Kiroranke and Wilk's involvement.
However, there's something close to reality which might've inspired this story. Ignacy Hryniewiecki, a Polish member of the Russian revolutionary society Narodnaya Volya, gained notoriety for participating in the bombing attack to which Tsar Alexander II of Russia succumbed. Hryniewiecki threw the bomb that fatally wounded the Tsar and himself. Having outlived his victim by a few hours, he died the same day.