  Gaia EDR3 data was used to identify potential members in the outskirts of
three ultra faint dwarf (UFD) galaxies; Coma Berenices (> 2Rh), Ursa Major I
($\sim$ 4Rh), and Bo\"otes I ($\sim$ 4Rh), as well as a new member in the
central region of Ursa Major I. These targets were observed with the Gemini
GRACES spectrograph, which was used to determine precision radial velocities
and metallicities that confirm their associations with the UFD galaxies. The
spectra were also used to measure absorption lines for 10 elements (Na, Mg, K,
Ca, Sc, Ti, Cr, Fe, Ni, and Ba), which confirm that the chemical abundances of
the outermost stars are in good agreement with stars in the central regions.
The abundance ratios and chemical patterns of the stars in Coma Berenices are
consistent with contributions from SN Ia, which is unusual for its star
formation history and in conflict with previous suggestions that this system
evolved chemically from a single core collapse supernova event. The chemistries
for all three galaxies are consistent with the outermost stars forming in the
central regions, then moving to their current locations through tidal stripping
and/or supernova feedback. In Bo\"otes I, however, the lower metallicity and
lack of strong carbon enrichment of its outermost stars could also be evidence
of a dwarf galaxy merger.
