R0B-H4N Sentinel appears to be a floating robot which is only consisted of head and a pair of laser shooters as its arms/hands.
- Attack: Medium
- Life: Average
- Speed: Fast
- ↑ R0B shoots the enemy twice by reaching each arm toward them. Then it opens it mouth to shoots a large laser beam.
- ↑ R0B aims its arms at an angle to shoot lasers. The lasers fall on each enemy. Regardless of star version, the falling lasers are blue.
The R0B-H4N Sentinel squad is well known of the public of the arena. These robots originally served to protect the spectators from the mutants who were fighting there. Today, one model survived the countless battles he had to watch.
- Its Gold and Platinum version resembles the Gundam mechas' head from Gundam manga/anime series.