  We construct models of coupled semi-dynamical (spin) and dynamical mirror
multiplets of ${\cal N}=4$ supersymmetric mechanics in $d=1$ harmonic
superspace. Specifically, we consider a semi-dynamical mirror multiplet ${\bf
(3,4,1)}$ coupled to dynamical mirror multiplets ${\bf (1, 4, 3)}$ and ${\bf
(2, 4, 2)}$. Coupling of the multiplets ${\bf (3, 4, 1)}$ and ${\bf (1, 4, 3)}$
yields a mirror counterpart of the earlier constructed model implying the Nahm
equations for the spin variables with the bosonic component of the multiplet
${\bf (1, 4, 3)}$ as an evolution parameter. We also couple the mirror
multiplet ${\bf (2,4,2)}$ to the mirror semi-dynamical multiplet ${\bf (3, 4,
1)}$ using chiral ${\cal N}=4$ superspace. The models constructed admit a
generalization to the SU$(2|1)$ deformation of ${\cal N}=4$, $d=1$ Poincar\'e
supersymmetry.
