Vi would get drunk, angry, and backhand you some night probably paralyzing you.
Fiora is too much of a perfectionist so she would eventually start emotionally abusing you for not being on her level.
Elise would eat you eventually.
Vayne would get tired of you not hunting enough evil and just leave you, never letting you know why.
Sejuani would be similar to Fiora but with more physical abuse.
Lissandra would freeze you to death once you become boring, so in about 5 minutes.
Ahri would murder you.
Rek'Sai would eat you.
Orianna would break you because of her curious nature.
LB would emotionally manipulate you into eventual madness.
Cassiopeia would kill you once you became boring or she manufactured something to be jealous about.
Lux would dump you for new hotness.
Syndra would kill you for being subpar.
Morgana would use your life essence in some ritual to get more power.