The one with the Talent of "Invisibility" wasn't Gray Bear, but Tin, who seemed to be the least active member of the team.

However, the term "invisibility" might be an apt description of her role in the team.

Mamba's Talent "Gecko": He could move along walls and ceilings with agility like a gecko, had exceptional vision in the dark, suited for stealth and assassination. Moreover, his severed limbs could regenerate, giving him strong recovery abilities, positioning him as a half-warrior, half-assassin.

Gray Bear's Talent "Beast": As the name suggests, he could transform into a giant beast at will, with explosive power, destructive force, and defense greatly enhanced, serving as the team's tank.