Wadanohara and the Great Blue Sea (manga)

An Ocean in Peril! The young witch Wadanohara has returned from a journey across the sea, only to find that her peaceful ocean home has come under attack from the nefarious Tosatsu Empire. Alongside her faithful familiars -- Memoca, Dolphi, and Fukami -- Wadanohara promises to do all she can to prevent a terrible war. But when a mysterious figure from her past demands that she leave, can the pure-hearted Wadanohara muster the courage and magic she needs to save the Sea Kingdom once and for all?