Encouraging Inter-Party Bonding?

I have a party of 5 pcs who are all a bit strange in their own ways. A fairy who works as a travelling entertainer, two dragonborn who are employed with a guild, a tiefling who is wanted by the law and an elf who is also wanted by the law. A lot of their goals and motivations don't line up very well, and the coherency of the group is held together with duct tape. It's a newbie group, and while one of the dragonborn gets along with the tiefling, no one else has bonded on even the shallow level that they have. I am also a newbie DM, so I'd like to ask the more experienced DMs of Reddit how they'd encourage bonding within a group that is full to the brim with traumatized orphans turned adults?