Killerpillars are enormous green caterpillars with magenta-coloured undersides and a large spike at the end of their tails. They have a series of red spots running down the length of their body, as well as two on their head that can be mistaken for eyes. Its description in the original Dragon Quest Monsters states that they do not enter a cocoon to become a butterfly or moth. They attack by rolling themselves up like a wheel to strike foes and can be pesky opponents by bolstering their allies' defence with Kabuff, as well as spitting silk to immobilise opponents. In Builders, the killerpillars prefer tropical environs and their stingers carry a paralysing neurotoxin that can leave the player vulnerable to attack for several seconds.
Killerpillar appeared from the beginning. In this game, it is able to spit out a silk thread that can immobilise characters. Starting from Version 5.2, vicious killerpillars can be encountered in the Netherworld, with no change to their behaviour.
Though these creepy-crawlies might look like larvae, they are in fact fully grown. They keep themselves warm in cold weather by rolling up into snug little balls.
These caterpillars are incredibly dangerous to approach early in chapter 2, due to their paralysing attacks. Interestingly, the bodkin archers have taken to raiding their nest in retaliation for preying upon their people. The Builder can lend a hand and be rewarded.
Killerpillar appears as an E-rank monster of the Nature family. It can be recruited from Chapter 4, Episode 1: Forms of Love from Part 2 of the main storyline. The Killerpillar can participate in the Winter Queen's Battle Road as a party member.