Here are 10 popular hashtags for Attack on Titan

#AttackOnTitan - the most commonly used hashtag for the series

#ShingekiNoKyojin - the original Japanese title of the series

#ErenYeager - the main protagonist of the series

#MikasaAckerman - Eren's childhood friend and fellow Survey Corps member

#LeviAckerman - the captain of the Survey Corps' Special Operations Squad

#SurveyCorps - the military organization in the series that fights Titans

#Scouts - another name for the Survey Corps

#Jaegerists - a faction in the series that supports Eren Yeager's goals

#FoundingTitan - one of the most powerful Titans in the series

#Anime - a general hashtag for anime-related content, including Attack on Titan.