Flytrap
Flytrap was an eccentric 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.
We then got to see quite a bit of Flytrap in "First Casualties" and "Terrorists". It turns out that when Flytrap died on Ararat, his seeds dispersed, and a new Flytrap was born. This Flytrap was a lot more formidable and had a number of plant powers that made him a huge asset in Bad Company's battles.
Flytrap, along with his Bad Company mates, discovered the truth about how the Krool War started and when they tried to make it public, they were branded Terrorists by those trying to keep the truth hidden. They then set off on a mission to find proof of the conspiracy. Kano found the proof but kept it a secret so that Bad Company would remain together on a mission.
Flytrap remained in Bad Company as a valuable member of the team. The last we saw he was continuing on their mission to find proof of the Ararat War Conspiracy.