Your main has great synergy with another champion...

And the League starts a program where champions have to spend time outside the Rift to increase their synergy.

I'll give some examples. My main is , who is - for better or worse - an ADC now, so some support champions he has synergy with.

(both of them awkwardly try to find things to do, they end up brawling for lack of anything better since they lack common interests beyond the League itself)

(leads Mordekaiser through Zaun, where they check out many cool tech and weapons programs and discuss the logistics of their metallic composition)

(somehow ends up following Braum on his adventures throughout Runeterra, unintentionally becomes part of his legend to his dismay, and eventually becomes a heroic legend himself)

(they end up going to Piltover where Janna takes a job as a forecast announcer and shanghais Mordekaiser into being her cameraman of all things)

(they discuss being bound to their armor as well as the hostility they generally have towards most others, and find they have a lot in common, becoming genuine friends)

(is dragged around by Leona as they travel the world, with Leona spreading words of praise for the sun, and being stalked in secret by wherever they go)

(they hang out and do typical Shadow Isles stuff, on occasion they prank Lucian, and unbeknownst to them Diana is continuing to stalk Mordekaiser for unknown reasons)

(they spend a lot of time doing casual things like going out to eat and discussing music, essentially what they would already do as band partners but more, and Diana is still following Mordekaiser and Sona catches her just as Leona and Janna come to recruit Mordekaiser for more traveling and work respectively, and Mordekaiser then has to deal with a massive catfight)