- Rintaro Okabe – The protagonist of the series, Okabe is a brilliant scientist who is also prone to fits of insanity. He is always trying to find a way to time travel and save the world from a future disaster.
- Moeka Kiryu – A female member of the lab team that works with Okabe, Moeka is an eccentric genius who can often be found daydreaming or making strange inventions. She also has a strong sense of loyalty to her friends and colleagues.
- Mayuri Shiina – Another member of the lab team, Mayuri is an observant and analytical woman who often has insightful comments about the events taking place around her. She also has a strong sense of justice and morality.
- Suzuha Amane – A childhood friend of Okabe’s, Suzuha is an introverted young woman who suffers from occasional bouts of mental illness. She becomes involved in Okabe’s time travel experiments after he saves her life on more than one occasion.
- Kurisu Makise – A brilliant computer scientist working for SERN, Kurisu becomes involved in Okabe’s time travel experiments after he hacks into her computer system and steals some confidential information. She eventually falls in love with him despite their differences in personality and intelligence level.
- Luka Urushibara – A childhood friend of Okabe’s, Luka is an unemployed slacker who becomes involved in Okabe’s time travel experiments after he loans him some money for rent payments. He eventually becomes one of Okabe’s most trusted allies and confidants during his time travels." 7." Yuki Nagato - A former member of the Japanese military who was abducted by aliens while on duty as a soldier, Nagato eventually joins forces withOkabe and his friends to stop SERN from using time travel for evil purposes." 8." Ruka Urashima - The daughter of ..