How to Write a Book without Getting Killed

Your sister read a book and she really liked it. When she found out the author of the book is looking for an assistant she contacted you, her unemployed younger sibling.
Of course you accepted. What other choice did you have when rent was due?
However it turned out that this was not a regular author. Akari had to conduct research for her book and she had a very hands-on approach to research.
Your job in this?
Make sure she could write her book without getting killed!
Characters
Akari
The author you have sworn to protect. She is a bit of an airhead and wears a flower in her hair. She is a skilled melee fighter and likes to travel to very unpleasant places.
Risa/Rito
You're an unemployed college graduate ready to do whatever job you can get. However this job is different from all the other jobs and it was from the beginning only available to you.
You can choose the gender of your main character when the game starts: Risa (f) or Rito (m).
The dialogue will change depending on the character you choose especially when it comes to any romance scenes. 
What this Game offers
Different Worlds
You will follow Akari to 5 different worlds with completely different settings:
- Steampunk
- Medieval Fantasy
- Frozen Wasteland
- Space Station
- Gothic Horror
Between these adventures you will meet up with Akari in the real world and do stuff like going to the movies.
Fighting
The game offers 30 individually styled weapons from magic clubs to plasma gatlings that you can use in turn-based combat against 60 different enemies!
Riddles
There are 15 riddles in this game that you must solve to unlock the final boss. Each riddle has a different setup and Akari is really keen on solving them all.
Romance
This game has two characters. If they stay professional in their work life or not is up to you...