Defender

These are the types of fighters that throw everything to the side for one thing of significance. Whether it be the town they grew up in, their family, perhaps a code of honour they promised to follow. You would do anything to ensure its safety of what you care for. 

This is my city

When in a significant location (most commonly tied to a characters backstory) you know it like the back of your hand. You have advantage on any checks based on locating something in this area (usually 20 mile circle if the overall area of a location is left vague). 

My city needs me

If another member of the party sets up a teleportation circle in this specified location, you can cast teleport on you and 4 other creatures of your choice to that circle at any time without needing another teleportation circle. You can only do this once per long rest. Later at 15th level you can cast scrying to examine this location or a specific individual. 

I think of home

When in combat, you can channel the thoughts of this significance into extra damage. When you hit a creature you can select from a pool of 10D6 to deal extra psychic damage for every attack done to that creature. You gain 1D6 back to this pool after a short rest and a long rest will give you all your dice back. At 18th level this dice pool increases to 15D6 and you can gain 2D6 back after a short rest. 

Champion of the people

You are inspired by those you consider close. You can add 1D4 to any attack role ability check or saving throw while within 30ft of your allies. 

Home is where the heart is

You no longer think of home as a place but rather as a feeling and the people you are surrounded by. You now have 2 expertise in insight and another skill of your choice.