Well, another place to check could be FanFiction.net. A lot of fans post their RWBY fanfictions there. However, the search function might not be as refined as AO3. So you may need to dig a bit deeper by browsing through the RWBY section and looking for stories with Ruby and Yamato in them.
You could try looking on fanfiction websites like Archive of Our Own (AO3). There are often a lot of RWBY - related fanfictions there. Just search for 'RWBY Ruby Yamato' and you might find what you're looking for.
Chapter 87, "Temporary Replacement", is the clearest early answer because it turns Princess Wen's situation into a concrete plot event. Early on, Luckily, at that time, Jiang Li had already taken her pot of stinky.... By the end, I'm driven crazy by him every day.] [+1 from above!.
Chapter 45, "Give a Sweet Date and Then a Slap", is the clearest early answer because it turns Sweet Date's situation into a concrete plot event. The chapter gives readers a real answer by opening on Helplessly, Jiang Yan had no choice but to step on the accelerator.
Chapter 187, "I Really Need an Apology", is the clearest early answer because it turns Shang Shaojing's situation into a concrete plot event.
Chapter 95, "The Problem Lies with Your Boyfriend", is the clearest early answer because it turns Is Jiang Li's situation into a concrete plot event.
Chapter 610, "Building a House?!", is the clearest early answer because it turns Yu Li's situation into a concrete plot event. It opens with Therefore, Jiang Yan became even more entitled and bossily ordered... and closes on I thought in their family, they use one and break one.] Everyone was....
Chapter 205, "The Fairy Descends to the Mortal World", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event. It opens with Ah Fu had no idea what the video Jiang Li mentioned was. and closes on Having such a sister certainly would bring happiness..
Chapter 293, "Hello Lei Ting, I am Chui'er Tuttu", is the clearest early answer because it turns Hello Lei Ting's situation into a concrete plot event. It opens with Damn, when will this hospital ever upgrade their beds?
Chapter 611, "The House She Built is No Ordinary House!", is the clearest early answer because it turns Built's situation into a concrete plot event. The chapter turns that into something concrete by moving from Jiang Li didn't care about the dissenting voices at all; she rolled...
Chapter 429, "Is There Such a Good Thing?!", is the clearest early answer because it turns Zheng Xun's situation into a concrete plot event. Early on, [What's going on?]" "[What happened, why is Team G causing a.... By the end, If you ask me, you must have conspired in advance to carry off our....
Chapter 98, "Jiang Li is So Daring!", is the clearest early answer because it turns Aunt Ying's situation into a concrete plot event. Early on, Jiang Li listened to the end and didn't have much of a reaction, only....