Quantum Quintet: To put it simply, they were like the Losers Club from IT. Faced off against a terrible monstrosity where two of them died. After that, the surviving three (who were later joined by S.A.M. and Glacier) became explorers of the unknown to expose and disprove it. However, over the years this "ghost hunting balooned into something greater. Something global. Especially after they received their powers. 
-Mentalic: Goyer Morrison. The brother to Gigawat, he and his brother created S.A.M. He has multiple PHDs and Doctorates. Many government organizations go to him for consultations as well. He can be a bit of a buzz kill with his gallows humor but he knows when to be serious.
-Gigawat: Stan Morrison. The brother to Mentalic, he and his bro... never mind. He is the more impulsive of the five, just like the lightning that courses through his body. Even if he can be a bit of a party animal, he's loyal to his brother, Lady Fathom and the two new additions to the team.
-Lady Fathom: Silvia Grant Ashford. She was always the voice of reason in their group. After the deaths of the two friends, she became even more cautious. No one dies on her watch ever. As an aquamancer, you'd expect her to be laid back and to go with the flow. No. She's as strict as a schoolteacher!
-S.A.M.: AKA Sentient Assistant Mechanism. The little bot is the extension of their high-tech base, its avatar. He can teleport the team, monitor their locations and deliver supplies to them. However, it's clear he wants more out of life than just to be the "bot in the chair".
-Glacier: During one of their interdimensional excursions, the team stumbled upon the long-dead ruins of Jotunheimr. As they explored it, they heard crying. Following the noise, they found an infant Jotunar. A baby frost giant. It never left their side since.

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