Colorful Gray

The mad Count Thanatos Fogg Granguignol was dismembered by a military strike force and sealed away in various places in his vast castle for the crime of human experimentation. As a result, the magical fusion reactor in the castle is on the verge of exploding!! The only way to stop it is to collect Thanatos' body and resurrect him. Iris, the eldest daughter of the Granguignol clan, is given the mission to find him, with help from her unique group of friends. (Source: Comic Medu, translated)