I'm trying to understand a simple Little Higgs (toy) model where the Higgs doublet is made of pseudo Nambu-Goldstone Bosons generated by breaking the symmetry from $SU(3)_L\times U(1)_Y$ to $SU(2)_L\times U(1)_Y$, in order to prevent fine-tuning and 'solve' the hierarchy problem.
In the toy model there are 2 sets of NGB $\phi_1$ and $\phi_2$, each containing 5 NGB (since there are 5 broken generators).
For 5 of these, some potential will be generated, giving them mass which gives us the Higgs doublet and a pseudo-axion.
The other 5 however are absorbed into 5 of the 8 gauge bosons from the $SU(3)_L$ which will become massive, leaving us 4 massless gauge bosons (3 from $SU(3)_L$ and 1 from $U(1)_Y$), of which 3 will later become massive due to EWSB ($W^+$, $W^-$, $Z^0$ and $A/\gamma$).
My question is how to interpret those 5 massive gauge bosons. They have to be physical and mediate some force, what type of particle could this be? I'm also unsure what the reason for the initial symmetry breaking could be.
Since it's just a toy model, none of the resources I found really talk about it, and the full models are a bit too complex for me to fully understand.