WARNING: This review may contain spoilers
So this is the fan favourite season of Sailor Moon and for good reason. Its got a good story, introduced memorable new characters, and the super from for Sailor Moon, Super Sailor Moon. This arc in general is probably my favourite in this franchise.
Story - Shortly after the events of R, Rei has an apocalyptic vision. Then the Sailor Soldiers face their new enemies, the Death Busters. They want to steal people's pure heart crystals in order to get the three talismans, which would then summon the Holy Grail. The story for this was really good. It could get intense at times, especially towards the finale. I'm giving the story a 9/10
Art - The art was beautiful as always. 10/10
Sound - As usual, the soundtrack was pretty good. 8/10
Character - Three new Senshi are introduced in this season - Haruka Tenoh, who is Sailor Uranus, Michiru Kaioh who is Sailor Neptune, and Hotaru Tomoe who is Sailor Saturn. Sailor Pluto also returns as Setsuna Meioh and together they make the Outers. I love the Outers so much. Haruka and Michiru especially mean so much to me. It was because of them that I discovered that I was a lesbian. Their romance was so beautiful and I enjoyed every moment they were on screen. My only complaint was how mean they could get. The scene where Haruka steals Usagi's brooch was so unnecessary and mean spirited. And the scene where they say Usagi has no qualifications to be their future Queen.... sheesh I know it was to test her power but still.
Hotaru is my absolute favourite of this season, she's just so precious and deserves all the happiness in the world. Her friendship with Chibiusa was so beautiful.
Speaking of which, Chibiusa returns in this season as Sailor Chibi Moon. She comes back from the future to train to be a Senshi. She was still bratty but she wasn't as bad as she was in R. Her friendship with Hotaru was honestly what made me ultimately love her.
As for the villains, I didn't care much for Kaolinite. Eudial was hilarious with the way she would make her appearance by driving in unusual places. Mimete was pretty annoying. The other three - Tellu, Viluy, and Cyprine - didn't get enough episodes for me to form an opinion on them. I do wish the Witches 5 actually worked as a team once instead of fighting with each other.
As for Souichi Tomoe, I don't understand how they took his manga self, who was abusive to Hotaru and even experimented on her, and made him this sympathetic man who just wanted to save his daughter. Yeah, the anime does this with villains in the manga but given how he was in the manga, I feel Souichi is one of those villains who didn't deserve that.
Mistress 9 was pretty good, its too bad we didn't get to see her much.
Characters get an 8/10.
Enjoyment - I really enjoyed this season and I can definitely see why it is a fan favourite. 9/10
Overall - Sailor Moon S is a great season that introduced a bunch of amazing characters and had a great story. 9/10