(The following list may update.)

Main Characters: Anne Boonchuy (protagonist) A 15-year-old Thai-American girl who redeemed herself from being a self-centred girl. Marcy Wu (protagonist) A 15-year-old autistic Taiwanese-American girl who is the top student in Class T1-T5 but clumsy. Sasha Waybright (protagonist) A 15-year-old bisexual American girl who knows about the Organisation that bought Titan Academy. 2046 (main sidekick) A 10-year-old autistic Cantonese-speaking Chinese Singaporean non-binary, who is secretly an FBI special agent spy who cares about people’s livelihood. Other major characters: Ruby: A major character gem who has a crush on Sapphire, and is friends with Anne and Sasha. Madeline 'Maddie' Flour: A 15-year-old girl, who was transferred to Titan Academy by the Organisation. She developed a great friendship with Marcy quickly right after meeting her. Gary Goodspeed: A 17-year-old student, who dreamed of going through adventures and always cares and worries about Ash, a long-time friend he met when he was young. Molly McGee: A 14-year-old optimistic Irish-Thai-American girl, who is friends with both Libby and Gary. Sometimes, Gary mistakenly called her 'Ash'. Ash Graven: A 17-year-old human girl, with Serepentis powers from the original Final Space universe, and a tragic backstory during her childhood.

Non- / Former Titan Academy characters:

Premyslaq Dalzell Puiredón:

A 36-year-old human. 2005 graduate of Titan Academy.

Avischluna ‘Ava’ Elizabeth Brotzmann:

A 35-year-old human girl. 2005 graduate of Titan Academy.

Tariq Muhammad:

A 21-year-old Malaysian. 2019 former top-class graduate in Titan Academy.

Inspired by Ridhwan Azman.

Bella (Amphibia):

A 21-year-old human girl. 2019 former top-class graduate of Titan Academy

Barrel:

A 35-year-old human. Nicknamed ‘Barrel the Brave’. 2005 graduate in Titan Academy. Currently a butler in the Boonchuy family.

Cheyenne:

Former Class T1-T5 student in Titan Academy. She was blacklisted from Titan Academy, because she sacrificed herself to Anne and her other classmates.

Quinn Ergon:

A 23-year-old FBI agent. 2020 graduate of Titan Academy. She has a strong relationship with Gary Goodspeed.

Tribore Menendez:

A 38-year-old FBI special agent. Always called himself as ‘Leader of the Resistance’.

Quatronostro Menendez:

A 18-year-old FBI special agent. The biological child of Tribore. He only speaks in Spanish.

Agent Yunan Longclaw:

An FBI special agent who partnered with 2046.

Biskit the Tiger Tiger:

A 30+ Tiger Tiger intern of Kevin Van Newton in the FBI.

Raine Whispers:

An FBI special agent.

Evra:

A shapeshifting being of pure energy. They took the appearance as ‘The Collector’ for the first time since they met 2046.

Terri:

2019 former top-class graduate in Titan Academy. Currently a scientist.