Flytrap was an ecentric solder who in an attempt to "get back to nature" had an Ararat plant grafted onto his arm.   



When the planet of Ararat began to deteriorate, so did Flytraps arm and it turned on him attempting to eat him. Wallbanger amputated the plant, but the damage to Flytraps body was too much for him and he died a short while later.



It was not the last time we saw Flytrap though, because he returned as a ghost in Bad Company - Kano to aid Kano.