Xenia

Xenia is the love of lambda. It is in some respects a combination of the loves of Eros and Philia

Xenia has two opponent elements: the Underseer dominated Eros and the Overseer dominated Philia. There is a contrast between familiarity and difference leads to fertility. With too little genetic distance there will be inbreeding and with too much genetic distance there will be infertile hybrids.

Xenia occurs between both platonic friends and romantic partners and is often known as "chemistry".

Name
On October 31st 2021 it was renamed Xenia after the ancient greek concept for the balance between foreign and familiar

Eros
Eros is the Underseer Xenia. It is the Xenia of unfamiliarity.

It’s associated with desire and often specifically sexual desires, but this isn’t the fundamental element of it.

Philia
Philia is the Overseer Xenia. It is the Xenia of familiarity. It differs from Storge in that it’s still based on desire. It’s more of a desire for the familiar.