This mod makes Niranye marriageable if you have spoken to Maramal and bought an amulet of Mara. However, she won't be a Fence anymore due to some scripts with a quest taking priority over her beeing marriageable and a bug-free spouse. She will stil be a general goods merchant. Note that without her beeing a Fence shouldn't affect any of the quests involved with her.
Niranye is located in Windhelm at the market place. She is the High-Elf vendor.
If you really do want to have her as a Fence, don't download this mod.
I can't promise she can regain her Fence status after her quest if you uninstall the mod.
Spoilers below! Read at your own risk!
Niranye can become a Fence for the Thieves Guild after completing the quest "Summerset Shadows". With huge testing, I was unable to make her marriageable AND a Fence. A Fence is someone who can buy stolen goods.
Note that this shouldn't change anything in the Thieves Guild quest line.
The small jobs offered by Delvin and Vex are not supposed to be affected, but if this ever happen, report it. This mod was kinda hard for me to do due to my limited knowledge but I'm glad to hear to whathever advice or help anyone offers if there is any problem.