Thea Guanzon was born and raised in the Philippines as the eldest of three siblings. She holds a Bachelor of Arts in international politics with a minor in peace studies and she has previously worked in governance and women's rights.

Aside from being a writer, she is an avid traveller, an enthusiastic fangirl, a Dungeon Master, a voracious reader of fantasy and science fiction, an iced coffee junkie, and a horror podcast aficionado. She currently resides in Metro Manila with two turtles named Dumpling and Potato Chip, an evil cat named Darth Pancakes, and a rather alarming amount of houseplants.