#genuinely this came from hearing snippets of rose city and Ashley's choices as fearne and thinking through some of her greatest hits

[utilitycaster]

Talking as players outside the game is an incredibly important part of having good PC/PC D&D relationships, and obviously the characters involved in the relationship talking to each other in meaningful ways is crucial, but I think the importance of talking in-game in depth to other people is really underrated, in that it not only tells the other player what your character is feeling without having to reveal it in-game to them, but also serves to engage other characters in the story and deepen those platonic bonds to the point where they might even serve as confidants or wingmen. To give a bunch of examples and what they achieved:

Vax telling Gilmore he didn't want to string him along made it clear out of game that his feelings towards Keyleth were his priority, even though it happened where the other characters were not able to hear.

Similarly, Vex giving her blessing eventually after her initial resistance signaled to Liam that this would not be a major break between the twins.

Vax asking Vex what she intended to do about her feelings for Percy served not only as an opportunity for her to voice them to someone; it also serves as a big green light for Taliesin as Percy to kiss Vex later that episode (which he had already from Vex's resurrection ritual, but it underscores it).

Pike talking about Scanlan with Keyleth and Vex allows her to make it clear that she does ultimately like a lot of things about him despite sometimes being annoyed, and her talking to him through her earring while Scanlan is very much not there but Sam is at the table also serves as this kind of green light.

Jester asking Veth about kissing in relationship to Fjord lets Travis know where Jester is at and invests Veth in-game in the relationship.

Caleb asking Jester if she's "sweet on [Fjord]" lets her openly reassess her feelings after an intense arc and also indicates in-game that Caleb has noticed.

Beau waiting to hear the sound of thunder signals to Ashley (who was not at the table but who was presumably staying updated on events) that Beau has feelings for Yasha; it also allows those playing Yasha (often Matt for pure RP and Travis in combat) to return that flirting, since the baseline was already established.

Possibly the most obvious example, but Beau and Fjord's conversation on Rumblecusp not only clarifies to the whole table where everyone is (opening the door, for example, for the scenes in the beer garden a few episodes later of Caleb having Fjord and Jester dance together and Caduceus encouraging Yasha to pursue Beau) but very much serves as a green light to Ashley and Laura respectively. This is then mirrored by them talking after Beau has asked Yasha on a date and Fjord and Jester have kissed, and everyone involved can "debrief" with their partners not present in-game.

As mentioned, this is mostly about PC/PC relationships because PC/NPC is an inherently different dynamic mechanically though still should be a conversation, but Veth describing Yeza and Jester asking Caleb about his feelings about Essek both give Matt clues for playing these NPCs and how things might be received.

FRIDA mentioning their crush on FCG to Deanna means it's not a complete surprise to Sam, since it is a very sudden relationship, and lets him prepare and decide how FCG would feel in the moment, and also establishes how Deanna will feel about it.

Similarly in the C3 Uthodurn arc, Fearne going to Chetney about Deanna is an incredibly good move from Ashley (to the point that talking about this is what led me to write this whole post). It lets Travis play out where Chetney is. It lets Aabria therefore hear not only where Chetney is, but also know that Fearne is potentially interested. It establishes a ton of the dynamics for a relationship that out of game everyone knows will not have a full campaign to play out since one of the characters involved is a guest. And finally, it signals to Christian as FRIDA what the situation is in case Deanna confides in them.