I was always disappointed that Seto had no unique dialogue, in fact she has no dialogue at all outside of her recruitment speech and one line used when she gets up from being K.O. Her mother Esata the Stone Golem on the other hand, has a ton of unique lines for situations that will almost never be encounter, especially since your interaction with her is very limited throughout the game.

So what this mod does is add more dialogue to Seto, Scion of Esata the Stone Golem. There are two basic dialogue group triggers, the dialogue package for the character and dialogue that triggers when you change biomes.

For the character dialogue package, I:

Assigned Seto to player dialogue package slot (previous generic shek warrior which didn't seem to trigger)
Assigned lore relevant vanilla generic dialogue from Esata and Shek warriors to the event triggers under Seto. This dialogue should trigger when Seto sees a neutral squad, locked in a cage, tied to a pole, being eaten, defeating an enemy, being healed, healing others, running out of first aid kits, getting up from being K.O., spotting animals, encountering physical hazards (acid rain, etc.) and losing limbs.
An additional start healing dialogue that will use the targets name.
WIP - Dialogue triggers for spotting different enemies 
WIP - Dialogue triggers for arriving in player base

The second change is to the biome dialogues, which comprise the bulk of the random chatter that you hear from characters like Beep, Agnu, Hobbs. This is dialogue that I have written based on my interpretation of the characters, content from FCS, and the Kenshi Wiki. These dialogue lines are focused on Seto and other speakers are based on race. However, there are lines specific to certain other unique characters. To date, To date there are dialogue lines for:

Beep, Headshot, Ruka, Doctor Chung, Izumi, Burn, Sadneil, Kang, Miu

The biomes affected by these changes are:

Stenn Desert - 7 lines. (world state related)
Bast - 1 line.
Fog Islands - 1 line.
Deadlands - 1 line.
Swamp - 5 lines (world state related and biome related)
Cannibal Plains - 1 line.
Misc Biome (triggered on numerous locations) - 3 lines
Okran's Pride - 1 line (world state related).
Royal Valley - 3 lines (world state related)
Darkfinger  - 1 line
Great Desert - 4 lines (world state related)
Arach - 3 lines (world state related)
Floodlands - 1 line

All of the dialogue is lore-friendly and should match the situation. This will not change Seto's starting stats or equipment and shouldn't affect any of the recruitment of her. She is one of the more difficult characters to recruit, though so make sure that you have fulfilled the right world states in order to do it. Same for triggering the dialogue, most depends on world states as it is commentary on what is happening in the world.
Also note that in order to make this mod work, I have changed the dialogue trigger frequency. The majority of dialogue is set to be spoken only once, so if you miss it you'll never hear it again. This mod changes the dialogue frequency from once to once a week in game time. I have been playing with these settings trying to find a balance between immersive dialogue and annoying chatter. If you find that the characters talk too much or talk over each other, let me know and I'll try to tweak it if I can. If you don't like chatty characters, then this probably isn't the mod for you. If you just wanted the vanilla dialogue and none of my content, I would download Let's Talk by BLKCandy. It makes all the same changes and more. If you load Let's Talk after this mod, the changes from Let's Talk should override the frequency of dialogue in my mod, but leave the new lines intact.

Lets Talk - https://steamcommunity.com/sharedfiles/filedetails/?id=1575316590 

This mod is available on Steam Workshop - https://steamcommunity.com/sharedfiles/filedetails/?id=1674547229 

As request, I did a small update to Yamdu, so that he would have a more fleshed out dialogue package using Hiver Prince and Hiver ronin vanilla dialogue. He should also refer to player recruits by name when healing. 

Shoutout to Nanogiraffe and Boron for the guides on how to mod dialogue. Let me know if there are any issues or grammar problems and try to screenshot the dialogue for me if you can.