The Fandom Post is reporting that Tubi TV is now streaming the Holy Knight anime. The series is available with both an English dub and the original Japanese audio with English subtitles.
Holy Knight is described as:
The story centers around a timid orphan named Mizumura Shinta who goes to a missionary school in Tokyo. His seemingly normal life changes when a beautiful half-human Romanian girl named Lilith suddenly transfers into his school. Mizumura discovers that he is actually a vampire hunter and the successor of the Romuald lineage.
Source: The Fandom Post