  There exist various defect-brane backgrounds in supergravity theories which
arise as the low energy limit of string theories. These backgrounds typically
have non-trivial monodromies, and if we move a charged probe around the center
of a defect, its charge will be changed by the action of the monodromy. During
the process, the charge conservation law seems to be violated. In this paper,
to resolve this puzzle, we examine a dynamics of the charge changing process
and show that the missing charge of the probe is transferred to the background.
We then explicitly construct the resultant background after the charge transfer
process by utilizing dualities. This background has the same monodromy as the
original defect brane, but has an additional charge which does not have any
localized source. In the literature, such a charge without localized source is
known to appear in the presence of Alice strings. We argue that defect branes
can in fact be regarded as a realization of Alice strings in string theory and
examine the charge transfer process from that perspective.
