Most ants are fine as long as they aren't farming aphids. If you see dont aphids and sticky mess leave ants alone they just crawl around. Spiders are awesome. Fire ants on the other hand, are total buttheads who like to make baby nurseries in my pots. If I water them enough, they go away. You will know if you have fire ants if you get near the rose/pot and get bit a zillion times lol.

Shake the plant over a piece of paper and if you see tiny dots moving, they are spider mites. tj

If you are talking about the orange beetle with black spots, its a Lady Beetle, one of the good guys.

Looks like a cut worm which is actually a type of caterpillar. They feed at night so you can go out and pick them off or use BT spray which is a bacterial spray that targets caterpillars and is organic gardening approved. These guys tend to chew plants right at the base so you may see young plants just falling over.