Your Strength score increases by 2, and your Constitution score increases by 1.

exo's live forever and even if they are broken they can always be repaired, but rust can always kick in and give rebuffs 

exo's  society, with its clear roles and tasks, has a strong lawful bent. The exo sense of good and evil comes from their creator so they usually share the same as their creator.

exos very from any size 

Your base walking speed is 30 feet.

You have proficiency in the Athletics skill.

you can focus to make a part of you armor stronger. When you take damage, you can use your reaction to roll a d12. Add your Constitution modifier to the number rolled and reduce the damage by that total. After you use this trait, you can’t use it again until you finish a short or long rest.

You count as one size larger when determining your carrying capacity and the weight you can push, drag, or lift.

ask your dm in circumstances not listed were you may have immunity

You can speak, read, and write almost any language