Black Tea Dragons have small scent glands on the underside of their wing arm that release a pleasant scent. Though many creatures enjoy being in the vicinity of Black Tea dragons, the scent is intended to draw in swarms of butterflies. Though Black Tea dragons are full sized dragons, these insects are the mainstay of their diet.

Dragons are highly-intelligent reptilian creatures that—from a human perspective, at least—appear to live forever. Many different varieties of dragon exist, each with their own unique qualities, habitats, and behavior. Adolescence in dragons is usually marked by the growth of a hatchling’s wings, although not all breeds of dragons grow wings and some breeds have other traits that indicate the beginning of maturation. In Galsreim, dragons and humans coexist peacefully.

Having known Zehuva since they were hatchlings, Tsai was an eager supporter of her friend's invention: the bitter, invigorating drink she called "coffee". She intended to try it in order to support her golden friend's business, but soon fell under its spell. Breakfast, second breakfast, lunch, dinner, or supper, Tsai always has a serving of the bitter concoction at her side. She takes it black, and finds it absurd that any would choose to mar its perfection by adding milk, flavorings, or worst of all, sugar. It confuses her that some dragons are surprised or even offended that she prefers coffee over her namesake, tea. Tsai is often involved in heated debates over which drink is better, and she'll be in the middle of arguing about how easy it is to get things done when awake for days before passing out on the ground from fatigue.