- — Mr. Grunty —
"Mr. Grunty" (プチグソさん) is a Baby Grunty owned by Hotaru. It was found by her after its original owner abandoned it when it became sick. Shugo and Hotaru managed to find a cure for it, and as a result it became permanently attached to them. Mr. Grunty spends most of his time on Hotaru's head, and is known for his insatiable appetite. During the Legend of the Twilight Bracelet Manga in A.D. 2014 when Shugo finds himself hunted by Kamui and the Cobalt Knights, Zefie used her powers on Mr. Grunty to transform into Longhorn Grunty capable, a unique capable of flying away. However the effect was only temporary, and Mr. Grunty returned to his normal state shortly afterwards. Elsewhere during the Legend of the Twilight Bracelet Anime within episode the last episode. Mr Grunty becomes Wing Grunty after Shugo uses his Twilight Bracelet to power him up.
- Mr. Grunty's Japanese VA in the anime is Tamaki Nakanishi.