User blog comment:Valeth/Rider of Imperial Capital/@comment-32751919-20190727030822/@comment-27971189-20190727132823

In regards of gender-bending. The main reason is balance of character interaction.

See her first bond? Thanks to Gensai and his Master personalities I have difficulties portraying her as 'common sense of underground movement' under male character.

The dynamic also feels awkward when she met Chaldea + Shinsengumi later; simply put I found it more comfortable writing her as female character given Ryoma in this works is NPC (reminder, this is written during EOR) with little to no combat capabilities compare to Servants.

Other driving force would be ... I wanted to have reliable onee-san character.

FGO females are rarely click with my taste. Also when I wrote GG event I realized DI is filled with "depressing" female characters, so working on this "Rin" feels like a nice change of pace you will love to NP 5 her after the event ended.