Name: Hijikata Toshiro
Species: Human
Gender: Male
Birthday: 5 May (Children's Day in Japan)
Zodiac: Taurus
Age: 20's
Blood Type: A
Height: 177 cm
Weight: 64 kg
Others: Right-handed, chain smoker
Affiliations: Shinsengumi
Hijikata is the famed chain smoking, vice commander of the Shinsengumi
so named by his subordinates, because of his fearsome demeanor.
Purportedly the brains behind the force, he takes his work seriously,
and is fiercely loyal to his leader, Isao Kondo.
Hijikata has a reputation as a fearsome leader, earning the nickname of
"demonic vice-commander". He is also hot-tempered and often speaks of
seppuku. However, despite his cold exterior, he does have a more
compassionate side. He also has a tendency to cry after watching movies
that are not particularly emotional.
Hijikata is obsessed with mayonnaise and thus has the nickname "Mayora".
He has been known to smother anything he eats under a mountain of
mayonnaise, and he carries a number of objects shaped like jars of
mayonnaise, such as his cigarette lighter. He was popular with girls
until they discovered this obsession.
He enjoys fighting and sees Gintoki as a rival in practically everything
he does from drinking contests to rock, paper, scissors ever since
being defeated by him in battle. He is in constant danger of being
killed by the attempts on his life by Okita. But, despite all this, he
sees Okita as one of his close friends, and vice versa.
Before joining Shinsengumi, he used to be a trouble-maker ronin. He
enjoys fighting/having a good fight and says he doesn't care how many
Amanto buildings get blown up, he only looks forward to having a big
battle with the Joui rebels after Shinsengumi has rounded them in 1 fell
swoop, in Episode 5.
He also formulated the Kyokuchuu Hatto, the 45 Regulations that form the
disciplinary framework for Shinsengumi members, and implements them
firmly.
(Source: Gintama Wikia, Wikipedia)