cations

[Katie Bart 1I]

Will a cation ever be within the coordination sphere of a coordination compound?

[Amanda Lin 2I]

The coordination sphere includes the central metal cation that the ligands attach to.

[Sion Hwang 4D]

The coordination compound itself can be a cation, if it is bound to an anion such as: Coordination sphere + Cl2.
If this molecule was neutral, the coordination sphere would have an overall charge of +2, because the 2 Cl's give a negative 2 charge.

Hence, the central metal atom could have a +2 charge, if the surrounding ligands had a net charge of 0.

Or, the central metal atom could even be an anion, if the ionizable element surrounding the sphere were a cation.