Jonathan Harker

Jonathan Harker (ジョナサン・ハーカー) is one of the main characters of Dracula by Bram Stoker. While not mentioned in Volume 8, he would later make a cameo appearance in Volume 10 of the manga and OVA.

Appearance
On his cameo appearance in Volume 10, Harker appears to be wearing a dark green high neck trench coat with a matching green trousers and brown boots. In addition, he wore a wide brimmed, brown fedora with multiple white stripes covering across the fedora's band. He had blue eyes, and was standing around 6ft tall and a short, white hair.

Personality
Harker is incredibly devoted to his wife, Mina Murray. He's incredibly hardworking into which, his employer noted that. His devotion for his wife is the reason why Murray loves him, and Harker is hopeful about the future he'll have with his fiancée. In addition, Harker is respectful to his friends. So much so that in respect for Quincey Morris sacrificing himself in order to defeat Dracula, Harker named his son after him. However despite this, Harker admitted that while facing the three female vampires, Harker said that he felt a "wicked burning desire" deep inside his heart.

Novel Description
"Harker is a young English solicitor who travels to Transylvania to help Count Dracula deal with some property matters: Dracula uses him in his bid to get to England. Jonathan becomes a prisoner in Dracula's castle, and finally escapes after almost losing his life. Returning to England, he becomes one of the leaders in the brave effort to thwart Dracula's evil, eventually following Dracula back to Transylvania for the final confrontation."

- Dracula by Bram Stoker, Chapter 449: EXTRA MATERIAL FOR YOUNG READERS.

Dracula
Harker travels to Transylvania on a business to help Count Dracula, a mysterious client of his that wishes to move to London. Soon as he arrived to his castle, Harker is greeted by Dracula and finalizes the property transaction. Before then he soon realizes that he's made a prisoner and comes across the three seductive minions of the vampire Dracula, the Brides of Dracula. Dracula then leaves for England, abandoning Harker who's trapped within the castle with the three minions.

Fortunately, he managed to escape the castle and found himself in a convent as he suffers from a nervous breakdown. Soon after, his fiancée, Mina Murray, was notified about his appearance and soon arrives at the convent and nurses him back to health with the nun's help. Quickly, both of them marries in the spot and he was told that Murray's bestfriend, Lucy Westenra, was murdered by the Count. Both then returns home to England, and Harker immediately joins Professor Abraham Van Helsing, Quincey Morris, John Seward, and Arthur Holmwood in order to pursue the Count back to Transylvania.

Hellsing
After finding the Count's whereabouts, the group hastily goes to Transylvania and awaits for the Count. In a race against the sunset, Harker, Morris, Seward, and Holmwood battles against the Count's many minions before then the castle was burned up to crisp. Managing to escape to a nearby graveyard, the Vampire Hunter made a final standoff against the Count. Morris however, sacrificed himself and managed to impale the Count with a Stake across the heart. Whilst the vampiric mark across Mina's body disappears, Van Helsing confronts the count as Harker watches while protecting his fiancée.

After the standoff, Harker and Mina have a son whom they named after Quincey Morris, who sacrificed himself in order to defeat the Count once and for all. The surviving members of the group visits the burned now castle of Dracula's to reminisce before then all of them returns home as Van Helsing says that one day, Harker's son will learn the whole story.

Trivia

 * In Volume 8 of the OVA and manga, Harker was not listed within the many members of the Vampire Hunters Alucard had listed during his fight with Anderson. This could however, be a mistake made by Hirano.
 * One of the many misconceptions made by fans of the Hellsing series is that Harker was omitted in the Hellsing series, or he was killed during their encounter with the Count. This could not possibly happen however as Morris was the one who had died in the original novel, which Hirano stated; happened in the Hellsing series. As such, it's likely a mistake done by Hirano above all else.
 * Finally making a cameo appearance in Volume 10, Harker was shown guarding Mina from the fallen and bleeding Dracula. Both of them mirrors Vernedead and Seras.
 * His appearance resembles Alucard's previous appearance in Chapter 1 - Chapter 3 of the manga, where he wore a buttoned-trench coat up to his neck. It also resembles The Captain.