♥✗ ✓
♥ : Name one thing about the way their emotions work that they despise.
Rengar hates that no matter how many times he's told otherwise or it's proven to him, he's insecure on whether or not the bonds that he's forged with friends will hold. He couldn't tell you why he's certain the rug will be pulled out from under him but chances are it has something to do with the events in his life that caused or led up to him losing his memory.
✗ : Explain how they portray feelings of hostility or dislike.
Snarling, growling, letting his ears lay flat and back on his head. These are physical signs of him showing how he doesn't like someone. Nonphysical signs might just be him not talking to you or ignoring what you say.
✓ : Name at least two people who can trust them with their life.
Maokai, Gnar, Tāne, and Graves. Yeah you get four and not two.