Pestonya

Personality
Described as the kindest of the NPCs alongside one other, Mondenkinto.

Web Novel
Described to appear as a dog but is in fact a being closer to The Thing in disguise where her creator deleted the ability to transform like she should as a Heteromorph of her race.

When Demiurge mentions having trouble working with Sebas in the Web Novel Men in the Kingdom arc, he states he feels he could work better with Pestonya despite being polar opposites than he can with Sebas.

Arcadia
An interesting thing to note, just as Eclair is somewhat excused for his treasonous words due to that being programmed in him as flavor text, Pestonya was not viewed as harshly in the Light Novel for saving the human children due to having kindness programmed into her, barring Albedo's view on her and Nigredo's actions