When I was playing iEra, I stumbled upon a unique feature in Era:
Hold-tapping on your Graalian makes an in-game menu pop up where you can change both of your weapon slots, edit your character, and view your friends and joined gangs list.
However, hold-tapping on another person's Graalian makes a slightly different menu pop up witch gives you the option to befriend him, recruit him to your gang (if you are normally able to), invite him to your in-game house, report him, or message him.