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Yvonne H. (Sen.H.H.S)

TTRPG Freelance Writer

Current News

Available now!
Pathfinder 2e Bestiary 3 is now available! Check out the Stone Lion and Imperial Dragon entries!

Up on itch.io, In⚧️die March 2021 is themed on gender in TTRPG games. Check out the Mirror Tree song and lyrics inside!

Upcoming Publications
From Paizo:
Ruby Phoenix Tournament AP Book 2: Ready? Fight!
Secrets of Magic
The Grand Bazaar
Monster of Myths
...and more coming in 2021 and onward!


Yvonne, pen name Sen H.H.S., is a Taiwanese freelance TTRPG writer who has both self-published and written for acclaimed publishers and projects such as Paizo and the Unbreakable Anthology.

She spent her formative years in Taiwan before going abroad to live in Singapore, China, and Canada. She has a BMLSc degree from the University of British Columbia. She is also an alumni of the Writer Studio program at Simon Fraser University, where she studied speculative fiction under Hiromi Goto.

Yvonne currently lives in New Taipei City with her loving parents. You can follow her on Twitter @SenHHS for her latest activities and thoughts.

A list of projects she has participated in may be found under portfolio.

For business inquiries, see contact.


Lead Designer; Level Up: Advance 5th Edition, EN Publishing.
Adventure Writer; Unbreakable Anthology 2021, Unbreakable Publishers.
Contributing Writer; Goka; Pathfinder Adventure Path #167: Ready? Fight!, Paizo Inc.
Contributing Writer; Pathfinder Lost Omens: The Grand Bazaar, Paizo Inc.
Contributing Writer; Pathfinder Secrets of Magic, Paizo Inc.
Contributing Writer; Monster of Myths, Paizo Inc.
And more!

Short Story Writer; Sol Survivor: Print Edition.
Guest Writer; Vice and Virtue, Dungeons on a Dime.
Song Writer; In*die Zine Mar Issue.
Contributing Writer; (Imperial Dragon, Guardian Beasts); Bestiary 3, Paizo Inc.
Assistant Lore Writer; Atlantis Divided, Realmwarp Media.

Appendix Song Writer; Mnemonic: Weaver's Almanac.
Adventure Seed Writer; Arium Flash, Adept Icarus.
Song Writer and Performer; In*die Zine Sep Issue.

5e-compatible Adventure; Land of Pan-gu, self-published.

Student Anthology; Emerge 15, The Writer Studio.




Available for:
Worldbuilding and Lore Creation
TTRPG Design and Writing
Cultural Sensitivity Consultation and Reading

Please include "Business Inquiry" in subject line.
Email: yvonnehsiao925 @ gmail.com