I wish I had more time. O.K. Here goes......
The catcher droid is a apprehension/prison gaurd robot
A.- shoots poison needles in case of distance stopping is needed.
B.- A laser pistol in case of last resort prisoner stopping.
C.-shoots out liquid poison at close range to knock out prisoner/fugitive.
D.- is a vocal device to warn / scare & stop sound sensitive fugitives/prisoners.
E.- Cables extend out of front ( bottom image ) To detain ( shock ) Prisoner or fugitive.
F.- leg casings in case levitation engines are knocked out.
G.- Eyes ( No explanation needed )
H.- Gas sensor
I.- Levitation engines
J.- wind sensors
Sorry, tired, short notice. just my way of saying hello. :}