Unification and Texture Universality: The Essence of Hermiticity

A unified framework sheltering the type-I Dirac seesaw, based on the $\mathrm{\Delta }(27)\times Z_7\times Z_5\times Z_4\times Z_3$ symmetry, is proposed, preserving the naturalness of Yukawa couplings. It helps to visualize mass matrices within the lepton and quark sectors in terms of $\mathit{\text{three}}\mathit{\text{universal}}\mathit{\text{parameters}}$: ${\mathrm{\Sigma }}_1$, ${\mathrm{\Sigma }}_2$, and ${\mathrm{\Sigma }}_3$, highlighting that the down-type quark and light neutrino mass matrices exhibit a $\mathit{\text{Hermitian}}$ texture.