Found out that this unnamed LEGO Arc Trooper is actually a named Clone in Season 3 episode 2 (“ARC Troopers”). He is seen for a few seconds and goes by “Hammer”. I
Clone Trooper™ Command Station 40558 | Star Wars™ | Buy online at the Official LEGO® Shop US
LEGO 40558 Kommandostation der Clone Trooper im Review