I think people straight up can't invade you in ER if you aren't either doing multiplayer or used the "I want invaders" item.

Yeah, no. The main point of the multi-player is to get help from allies. It's only if you get that help that anyone can invade your game in Elden Ring

Literally not, how Elden Ring multiplayer works.

1. You can't invade solo host unless they specifically use an item for it

2. If you are coop you open yourself up for invasions and since a session has a 4 player limit you're always either in the majority (aka ganking) or on even grounds if you decide to only summon 1 friend and let the invader live long enough for another to show up. If you invade you are pretty much always going to be in a 1v3 situation.

It's a slang word to mean the outfit or accessories. I believe, it started out regionally, but it's been popular with the current teenager generation.

https://www.urbandictionary.com/define.php?term=drip

In the game, there are stones that you can find, and when you use them, they say something. There's no voice chat in the games, so these can be used to communicate

https://screenrant.com/elden-ring-prattling-pate-location-guides/

Your character doesn't speak per say, so you usually are limited to gestures for interacting with other players.

The stone refers to a series of items thatve been around since dark souls 1 where you drop a magic stone and a voice comes out saying the line. In dark souls 1 and some others it was a rock you dropped and it broke open making sound, so the "stone" term stuck.

In elden ring it's called a "prattling pate: 'voice line here'". Your character blows into it like a flute kinda and the line is spoken.

Basically the guy showed up, said "damn ur fashion is on point" then left :)

Not quite the same, but in WoW, you couldn't talk to the opposing faction. So sometimes people would make characters like this just to hang out in the other faction's zones and communicate using only emotes. Good times...