  Seeking singularity free solutions are important for further understanding
black holes in quantum level. Recently, a five-dimensional singularity free
black hole/topological star was constructed [Phys. Rev. Lett. 126, 151101
(2021)]. Through the Kaluza-Klein reduction, an effective four-dimensional
static spherically symmetric charged black hole with scalar hair can be
obtained. In this paper, we study shadow of this charged black hole with scalar
hair in terms of four kinds of observers, i.e., static observers, surrounding
observers, freely falling observers, and escaping observers in four-dimensional
spacetime. For a spherically symmetric black hole, the shadow is circular for
any observer, but the shadow size depends on the motion status of the observer.
On the other hand, the effect of plasma is also investigated by a simple model.
The radius of the photon sphere depends on the plasma model. Most importantly,
we find that the shadow sizes do not monotonically decrease with $r$ in some
cases.
