Thread:Matsczon/@comment-32745741-20181212183206/@comment-32745741-20181214003626

2 & 4 I gathered from this video: Hawkshaw: The Japanese of Dark Souls

As for 3: http://soulslore.wikidot.com/das1-design-works  Miyazaki: "As with Priscilla, I had a pretty clear image of how I wanted the character to look and behave so I entrusted his design to an out-of-house artist. All demons are born from the fire of chaos, but he [Ceaseless] was the first, born so long ago, when the fire wasn't yet stable. He possesses it, but he can't control it and it burns him constantly. Despite his size, he's actually the youngest of Izalith's children, he stands gazing up at the ruins where his sisters live. The only source of comfort in his pitiful, painful existence is the belief that they are watching over him."

Ceaseless being the first demon overrides what is said in the Demon's Catalyst, as this interview was conducted after the release of PTDE. Furthermore, the original text - which I will put here for the sake of transparency -  "イザリスの溶岩石を削り出したデーモンの杖炎属性の攻撃力を持った武器としても使える デーモンの炎司祭は、最初のデーモンでありイザリスの魔女が混沌に飲まれる前の呪術でない、炎の魔術の最後の使い手だった" never mentions the portion of  Pyromancy being created via Mother Izalith being engulfed by Chaos.

5 is fair.