Characters from the DC comics

Below is a list of characters who originally appear in the DC comics multiverse prior to the episode's airing, by appearance.

Arrow
Characters first appearing in Arrow:

Upcoming characters

 * Werner Zytle/Vertigo *
 * Tatsu Yamashiro/Katana (unknown)
 * Maseo Yamashiro (unknown)
 * Ray Palmer (unknown)
 * Ted Grant (unknown)
 * Ra's al Ghul (unknown)

Notes:
 * 1) Even though Laurel is the actual version of Black Canary in Arrow, Sara Lance/The Canary, who is in part an original character specifically created for the show, is also based on the same character.
 * 2) Even though Malcolm is the actual version of Merlyn in Arrow, Tommy Merlyn, who is in part an original character specifically created for the show, is also based on the same character.
 * 3) Both characters of The Count/Count Vertigo and Werner Zytle are based in part on the same DC comic book character, Count Vertigo.
 * 4) Sebastian Sangre is based in part on Sebastian Blood VIII who is the father of Sebastian Blood IX. Sangre means blood in Spanish.
 * 5) Maya's name is a combination of two characters, May Bennett and Anna Resik, both of who have received the Mother Mayhem identity and have become mothers to a Sebastian Blood.

The Flash
Characters first appearing in The Flash: