Granda is a Yin-Self Horror and one of the nine Horrors freed from the slate that uses their malice to seal the legendary Horror Eyrith. Its host is unknown.
Granda is freed from the Ady Slate when a mysterious person destroyed the slate using a Madou Art technique. After appearing, Granda is detected by the Watchdogs, causing it to flee into the pocket dimension. The Watchdogs know it will appear on the rooftop of a building, just not when. After being informed by the Watchdogs, Raiga is sent after Granda. Raiga waits at the location until Granda is detected, while its identity as a slab horror is revealed by Mayuri. It is stopped by Raiga and sealed with its essence congregates into a stone that Mayuri absorbs to seal the Horror.
Granda is able to travel into pocket dimensions and to multiply into many copies of itself, albeit the copies will crash against each other.
In the series, Granda is the 4th of the nine Horrors used as the foundation to seal Eyrith in the Ady Slate to be captured, though it is not the carrier of Eyrith's seed.