  We study a simplified model of flavoured Majorana dark matter in the Dark
Minimal Flavour Violation framework. The model extends the Standard Model by a
dark matter flavour triplet and a scalar mediator, through which the new dark
fermions couple to right-handed up-type quarks. This interaction is governed by
a new coupling matrix $\lambda$ which is assumed to constitute the only new
source of flavour and CP violation. We analyse the parameter space of this
model by using constraints from collider searches, $D^0-\bar{D}^0$ mixing,
cosmology and direct dark matter searches. Throughout our study, we point out
crucial differences between the Majorana and Dirac dark matter cases. After
performing a combined analysis within the context of all the experimental
constraints mentioned above, we analyse which flavour for the dark matter
particle is preferred by experimental data. We further investigate if this
model is capable of explaining the large measured value of the direct CP
asymmetry $\Delta A^\text{dir}_{CP}$ in charm decays. We find that significant
enhancements with respect to the Standard Model expectation are compatible with
all constraints, and even the central value of the measurement can be reached.
We also advertise the flavour-violating final state with two same-sign top
quarks produced in association with missing transverse energy as a smoking-gun
signature for flavoured Majorana dark matter at the LHC.
