  We study the spin 1/2 and spin 3/2 fermion fields in a thick braneworld
scenario in six dimensions called string-cigar model. This smooth string-like
model has a source that satisfies the dominant energy condition and undergoes a
Ricci flow. We propose a new coupling for the fermions with a background gauge
field which allows a smooth and normalized massless mode in the brane with
positive tension. By numerical methods the mass spectrum and the massive
eigenfunctions are obtained. The Kaluza-Klein massive tower exhibits the usual
increasing pattern and, in this scenario, the coupling term does not allow
tachyonic Kaluza-Klein states. The brane core and the background gauge field
alter the properties of the massive KK tower, enhancing the amplitude of the
massive states near the origin and changing the properties of the analogue
Schroedinger potential. Furthermore, we find massive modes as resonant states
in this scenario for both fermionic fields.
