The Tentacled Princess summary:
The kingdom of Sergei has a problem... the creatures of darkness known as Phantom Beasts have been appearing with increasing regularity, and attacking the populace. Allemande, the Second Princess of the kingdom, has been tasked with keeping the peace. In addition to her impressive skill with the sword, she can also use her talking teddy bear partner Maro to summon her own Phantom Beasts when things get too rough... (Source: MU)