No, the roach should not follow you into the SE chamber.
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×you need to keep the roach out of the force arrows, so you have to get it to come into the south chamber
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×but you need it to stay out of the SE corner
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×what could keep the roach from moving east until you have time to lure it back up out of the south chamber?
spoiler:
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×hang the roach on the west side of the orb, move straight east from the orb and up into the SE chamber.
Of course, that's just the first puzzle of this room! This is a really great room!
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