Some of the titans are named after the seven deadly sins. The Japanese names use the Latin word for the sin, while English uses a wide variety of name origins, like Mor Ardain coming from the Scottish Gaelic word for pride, ardan.
Kirsty Mitchell was nominated for "Best Female Supporting Role Vocal Performance in a Video Game" from Behind The Voice Actors for her performance as Morag (2017).
The green core on Pyra and Mythra's chest bares some resemblance to the life holds from Xenoblade Chronicles X and the Zohar from Xenogears and Xenosaga.
In Greek mythology, Elysium (or the Elysian Fields) are part of the afterlife world. The souls of dead people who were favored by the gods would arrive there to live a blessed and happy life, and to indulge in whatever employment they had enjoyed in life.. It was seen as a reward for righteousness and heroism in their original life.
In the English version each of the main races speaks with a distinct accent. Gormotti speak with a Welsh accent, Ardainians speak with a Scottish accent, Urayans speak with an Australian accent, Leftherians speak with a Northern English accent and Tantalese speak with a Southern English accent.