This is based on the ride Nemesis Reborn at Alton Towers the original Nemesis was Miss Nemesis I and Nemesis Reborn is Miss Nemesis II's home where she replaced Miss Nemesis I

An old tyrant lost to time

Extreme Sports

Scuba gear glued on body

2 girls hosting a nighttime pool party

Bog snorkeling

Scuba diving gone wrong

a monster who wants revenge on the phalanx for trapping her for 30 years and now has killed their spokesperson as a way to say never mess with me again!

the beast has risen from its 30 year imprisonment

A broken pair of snorkel gear from someone who lived there before you

Broken 

Phalanx Facility aimed to neutralise the Nemesis Monster 

Phalanx facility 

The best Dodgeball school 

Woah pipbomb 

Snorkel Pic competition at school

Tiny human in fish tank

3 friends on a beach finding a unconscious diver

3 friends find an unconscious scuba diver

Just left there for you to use to go snorkeling in the ocean

Snorkel gear left on beach

Snorkel instructor 

Two siblings going on a casual scuba diving trip

Two siblings scuba diving 

The TV show where people build robots with wheels and a weapon strapped to the chassis compete to win the giant nut

The TV show Battle Bots

You got them finally and went to use them

 Swimming Goggles with a nose cover

Alron Tower rides as humans in a honkai star rail plot

Alton Towers if it was In Honkai Star Rail

She works as the aquariums fish tank cleaner, so she goes underwater now and then to clean the windows

A Korean scuba diver working in the aquarium 

Random pair of snorkel gear appears in your garage for no reason. Was it a gift or simply a weird appearance 

Swimming gear 

A great threat

Friends snorkel gear prank (glued to your body)

she is a kind and caring person always looking out for her family and friends to cheer them up