There's the thing; you said it yourself the creatures in the castle are MOSTLY of darkness.
Being "of darkness" doesn't equate to being demonic any more than being of light.
Funnily enough in AOS when Soma talks about his 'dark powers' he states that dark doesn't necessarily mean 'evil'.
So they aren't even fallen angels in the original.
Dracula gained dominion of an angelic creature.
So there you go even if only one creature in the place is specifically not a demon, then the idea that all the creatures are demonic has to get thrown out.
Point taken about the demonic.
This is what I never understood though, Dracula (as Mathias or Vlad) was once a religious man, but he obviously doesn't worship God (his denouncement later being illustrated during the events->ending of LOI) Yet, SOTN has a holy chapel (technically 2) and in the inverted Castle, the Amalaric snipers openly follow the player trying to inflict harm. Is it because Alucard is unholy, because of his cursed blood?
I guess it's harder imo to understand how Dracula can gain dominion over angelic beings, and why they manifest in his Castle, if say for example other creatures have come from the underworld. It's the
how I don't really understand.
As for Dracula's tier, he is the Dark Lord which is the top of the evil food chain.
So, no, I'm not saying any of the creatures are of a higher tier.
The games say that many of the creatures are summoned to the castle.
^this more relates to my point above.^
AoS kind of confuses things a little when it comes to the created monsters because, for example, a magically animated corpse shouldn't have a soul at all, nor should the golems.
However, you have to take into account that part of Japanese culture is the idea of animism.
If you know anything about the Shinto religion then you'll be aware that in Shinto everything has a "soul". Buddhism also to some degree.
I know vaguely of Shinto
I understand the concept of an essence or energy, rather than the stereotypical western definition of a 'soul'.
Even inanimate objects have a spirit.
That's where you get the legends of very old objects coming to life; the Tsukumogami.
The most popular example of which are the paper lantern ghost (Chōchin-obake) and the umbrella ghost (Kasa-obake).
So you could think of the souls in AoS more like essences than actual souls.
All matter has an essence/energy, 'soul' sounds better though.
So to answer your question, no, I wouldn't consider a Zombie Soldier a demon in any sense.
Cool, me neither. I actually think these were thrown in to illustrate that a force of army/military soldiers were involved in 1999, more than anything.
Oh, and Medusa was a goddess that was cursed by one of the Olympian gods and subsequently killed.
(TRIVIA - Medusa was the only one of the three gorgon sisters that wasn't immortal. Also, besides Euryale & Stheno, Echidna, the 3 Graeae and Ladon are all Medusa's siblings.)
So I have to assume that her spirit was summoned to the castle.
Interesting story about Medusa, and yes, one would assume she was summoned. Although some of the time she manifests as a floating head. Also in the context of CV, take LOI, she seems to enjoy inflicting pain upon humans.
Who knows, since they don't really ever tell you anything about what Dracula's soul is up to when he goes (presumably) back to hell after each defeat he may just have run into Medusa and 'recruited' her.
I bet he's off making deals with these monsters and recruiting them in a sense. If he promises that upon his return they will live gain if they give him their soul/ energy/ essence etc, this is a chance they would more than likely take. Can't say for certain though.