Heartseeker Dragons are very social creatures that emanate a sweet chocolatey scent. Their captivating perfume easily attracts adult dragons that don’t yet have a mate. Heartseekers use their keen sense of smell to detect solitary dragons and potential mates in the area. By rubbing their fins against objects such as trees and rocks, they leave a scent trail for the other dragons to follow to meet each other. Although these dragons are seen year-round, the scent of a Heartseeker becomes particularly potent during the middle of winter. During this time, a single Heartseeker may play matchmaker to dozens of dragons, but he will also choose a special mate of his own.

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.

The Seeker is aptly named. Ever since he learned of plentiful but inconsistent stories of his territory's past, his primary objective has been to discover the absolute truth behind Ylisse—previously known as Archanea. All its revolutionary movements, its darkest days, and the conclusion of the history-making war between Altea and the Dolhr, leading him to write numerous colourfully-written documents showered with reputable sources yet carrying unwanted truths.

His records detail the Dolhr's final onslaught vividly, describing the Altean army, accompanied by external forces, and how they fought the Dolhr. Medeus' moment of complete sanity loss: captured on paper forevermore and with it the words telling how the Desipis robbed his subordinate of their vitality, condemning them to death and focusing an overload of power on his nemesis, Altea's very own king. Medeus collapsed for the final time, hours into the battle, but the Seeker writes an ominous note on Marth's 'grievous' fate.