Small, red, large claws and insanely large and adorable eyes that are full of rowdiness and mischief is what Cancer Bubble is. He's pretty much easy going, wild and hyperactive as well. His attitude can range from childish and rowdy to extremely hyperactive. Most of the time, Cancer dons humanoid clothing to blend in with humans, despite being mistaken for a costumed wearing child. Cancer is also the smallest of the FM-ians. Cancer also enjoys wearing other types of outfits when he is "going" out. Which range from his Jump suit and red vest outfit to a Dick Tracy styled outfit. He also has a lab coat which is never shared with the members. "Akutare" was dubbed as a tag name for his rowdiness.

In wave form, He resembles a regular red crab with aqua colored legs.

Cancer Bubble appeared on earth a while ago in his humanoid form, trying to mask along the humans. However, his large claws and red colored body would make him stick out as a sore thumb; even when wearing humanly clothes. However, most people never seem to notice him. Despite he acts like a total buffoon and a lack wit, Cancer is pretty much smart, or so he says. Cancer can also be cocky and arrogant at times and sometimes a know it all, which also leads him into trouble. His size can also be an advantage and a disadvantage as well. Squeezing into small spaces such as air vents and not having his fellow members bend over to get something from bottom areas. Disadvantages would be mainly well, In wave form, being mistaken as an escaped crab from the local market.

Cancer also has a lovable personality, which gives him his firely attitude and prideful antics. Cancer is also an excellent member on the team as well.

Cancer enjoys old school video games. Ranging from the NES days and so fourth. A few of his favorite old school games would be Clash at Demonhead. A game he enjoys by a long shot and for it's crazy characters. He also enjoys RPGs. His current obsession is Xenogears. He also has a thing for Giant Robots. Cancer keeps his "treasures" hidden away from the other members, fearing his stuff would be sold for easy cash. Cancer is also overly protective of his treasures and will often pinch others if they get near them.

Cancer is extremely loyal to his fellow team mates. Cancer also loves doing outside missions that require him eavesdropping from small spaces. His size does come in handy. Cancer also feels he is family to the team. His sheer antics do bring joy and comedy the team. Sometime, his loyalty can cause him to gain an inflated ego. Other then that, he's a lovable member to the team.

Cancer can become overly excited, hyper and childish when he is in his non-wave form. He can be easily be considered a kid of the team. Not only for his size, but also for his antics. However, he can act very mature when something serious is up. Both sides can be proven to be a warm welcoming or a distraction.

"Buku..."