Twin Eidolon Summoner Subclass
u/Teridax68 has put together a short Summoner subclass to allow you to play as a pair of identical twins.
This one-page brew does exactly what it says on the tin: I've seen quite a few requests over time for an Eidolon that looked and felt like a Summoner's twin, and tried to implement just that. The implementation is also fairly straightforward: you and your twin have a complementary set of skills, and as your bond with your Eidolon strengthens, so does your ability to use your skills in sync with one another. As an added bonus, if you want to play as identical twins, you get the option to do just that with a 1st-level evolution feat.
Homebrewery Link:
https://homebrewery.naturalcrit.com/share/2daB5ImxPuJY
Original Post:
https://www.reddit.com/r/Pathfinder2e/comments/1kwktoo/twin_eidolon_fight_as_a_complementary_pair_of/
https://wanderingadventure.party/post/63