FYI, number in Goroawase reading for 2-9 theory:
1: ichi, i, hitotsu, hito, hi, bi, pi, fi, wan, a
2: ni, ji, futatsu, futa, fu, bu, pu, nu, ne, tsu, zu, ju, nyu
3: san, zan, sa, za, mitsu, mi, ta, da, so, zo, suri
4: shi, ji, su, zu, yotsu, yon, yo, fo
5: go, ko, itsutsu, itsu, i, u, ka, ga, ke, ge, faibu
6: roku, ro, mutsu, mu, me, mo, ri, ru, ro, ryu, shikkusu
7: nanatsu, nana, na, shichi, chi, te, de, yu, sebun, se, ze
8: hachi, ha, ba, pa, fa, he, be, pe, fe, yatsu, ya, eito, ei
9: kyuu, gyuu, ku, gu, kokonotsu, kokono, koko, ko, go, ki, gi, kin, kun, gin, gun, nain
10: too, to, doo, do, juu, ji, ten, den, te
Here's the lists for number reading in Goroawase: