Doctor skill
GIF: Doctor companion can heal you if your health has critical level.
Fight with monsters
Companions with warrior or fighter skill can fight with monsters and protect you.
Companion bags
You can place items into companion's bag to increase your inventory size. When you dismiss your companion, you will receive your items in your house next morning.
Adventuring with a companion
Companion menu
Got items saved in bag
At morning you receive saved items in companion's bag,
Use companion's bag
GIF: How to use companion's bag.
Recruit a companion
GIF: How to recruit a companion.