Banner: Blue
Morale - Bold2 or Bold1 (see below)
Movement: up to 2 hexes and battle.
Retreat: 1 hex / flag
Weapon: Claymore? - Melee only
Battle Dice: 4d when at full strength of 4 figures or 3d when less than 4 figures.
Bonus Strike: Yes - but 1st rolled against a mounted unit is ignored.
Special: When at full strength (4 figures) it may battle with 4d and may ignore 2 flags rolled against it.

Moves up to 1 hex and battles with 3d using a Short Sword. The Short Sword hits foot units on banner colors and bonus strikes rolled but mounted units they attack ignore 1 bonus strike rolled against them. This unit may also move up to 2 hexes but not battle.
https://boardgamegeek.com/thread/401649/clan-chief-weapon
Moves up to 2 hex and battles with 4d at full strength with its full complement of 4 figures. Once it is at 3 figures or less it battles with 3d. The Clan Chief hits other foot units on banner colors and bonus strikes rolled but mounted units they attack ignore 1 bonus strike rolled against them.
This dwarf unit is Bold2 and may ignore 2 flags rolled against at full strength with its full complement of 4 figures. Once it is at 3 figures or less it is Bold and may ignore 1 flag.
Q. Can the the Clan Chief become Bold3?
A. Yes. The Clan Chief at full strength is Bold2 but if it is supported by 2 adjacent units it becomes Bold3 (Bold2 at full strength + support = Bold3 - may ignore 3 flags)
This dwarf unit is Bold and may ignore 1 flag rolled against it.