Ghost-kin know Infernal and two other languages they picked up in their travels. Most on the Material plane know either Common or Undercommon, but any two other languages may be picked.

Only the wisest and most stealthy of the Ghost-kin have managed to survive fleeing the Blood Wars.  Most of their race made poor choices and were killed before they escaped.

Wisdom +2, Dex +1.

Ghost Sight acts like darkvision 60 ft, with a bonus.  If there is no source of light, your darkvision also allows you to see into the etheral plane, when on the material, and into the material plane when on the ethereal.  This does not work in the presence of any dim light, even a candle.

Ghost-kin are not used to the strong sunlight found on the material plane.  All Ghost-kin have disadvantage on attack rolls and on wisdom (Perception) checks that rely on sight when they are in direct sunlight.

At 1st level you know the Thaumaturgy cantrip.  When you reach 5th level you can cast the spell Blink once with this trait and regain the ability to so after a long rest.  Wisdom is your spell casting ability for these spells.

Ghost kin have seen the most terrifying events of the Blood War, and so have advantage on any attempt to frighten them, including Ghost's  Horrifying Visage, or the Lich's Frightening Gaze.  In addition, their strong connection to the ethereal plane prevents them from being possessed by Ghosts and prevents anything (undead) from moving through them via Incorporeal Movement.