John Seward

John Seward, M.D (ジョン・スワード) is one of the main characters from the novel, Dracula. In the Hellsing manga he made a cameo along with Quincey Morris and Arthur Holmwood and notably, Abraham Van Helsing.

Personality
Because of him barely appearing in Hellsing, appearing as one of the person on a flashback in Hellsing: Ultimate VIII, it's hard to exactly tell what kind of person he is; but however, due to the fact that the Dracula novel is canon - up until the end and Dracula's death, he was inquisitive, always seeking to understand, based on his discussions with asylum patient. He is also loyal and kind, which is emphasized by the care and attention he gives Lucy after she begins to exhibit symptoms of an unknown illness which they later recognize as the onset of vampirism.

Novel Description
"The former pupil of the vampire expert Professor Van Helsing, John Seward is in charge of a lunatic asylum in which one of the patients is displaying strange symptoms connected to a devotion to Count Dracula. Seward is in love with Lucy, and although she turns down his marriage proposal, he remains a good friend, travelling to Transylvania after her death to hunt down the evil Count."

- Dracula by Bram Stoker, page 450: EXTRA MATERIAL FOR YOUNG READERS.

Dracula
Seward is the administrator of an insane asylum not far from Count Dracula's first English home, Carfax. Throughout the novel, Seward conducts ambitious interviews with one of his patients, R. M. Renfield, in order to understand better the nature of life-consuming psychosis, or as he calls it, zoophagous. As a psychiatrist, Seward enjoys using the most up-to-date equipment, including using a recording phonograph to record his interviews with his patients and his own notes. Several chapters of the novel consist of transcriptions of Seward's phonograph recordings. One of the main contributions made by Dr. Seward is his recordings of the events depicted from his personal perspective as a doctor; allowing the reader to gain a scientific understanding of the behaviour of vampirism through his behavioural analysis of Renfield.

He is best friends with Quincey Morris and Arthur Holmwood. All three propose to Lucy Westenra on the same day. Although Lucy turns down Seward's marriage proposal, his love for her remains, and he dedicates himself to her care when she is suddenly taken ill.

He calls in his mentor, Abraham Van Helsing, to help him with her illness, and he helps Seward to realise that Lucy has been bitten by a vampire and is doomed to become one herself. After she is officially destroyed and her soul can go to heaven, Seward is determined to destroy Dracula.

Hellsing
He was present during the fierce fight between Abraham's men and the Count, and eventually, the Count was defeated and was seemingly finished off by Abraham. However, it is unknown what happened to him afterwards and later, it turns out, Abraham didn't actually finish off Dracula; he instead brings the severely weakened and unconscious No-life King back to his lab, some where, and experimented on him.

Legacy
Later on, he and the others, including Abraham was mentioned by Dracula, now Alucard, during his fight with Alexander Anderson; with the Count telling Anderson to defeat him - just like what John, Quincy, Jonathan, Arthur and Abraham did; and most importantly, their visible-absolute, determination into defeating Dracula and saving Harker.