To add new peds, use fastman's limit adjuster plugin.

Here is a tutorial:

https://www.youtube.com/watch?v=KSzGUf1qMMo&ab_channel=WhamDieMoe

Add this line into peds.ide file.

***, SOFYRI2, SOFYRI2, CIVFEMALE, STAT_COWARD, sexywoman, 1000, 1, man, 6, 4, PED_TYPE_GEN, VOICE_GEN_SOFYRI, VOICE_GEN_SOFYRI
***, CWFYFR3, CWFYFR3, CIVFEMALE, STAT_GEEK_GIRL, woman, 1000, 0, null, 1, 1, PED_TYPE_GEN, VOICE_GEN_CWFYFR2, VOICE_GEN_CWFYFR2
***, SOFYRI3, SOFYRI3, CIVFEMALE, STAT_COWARD, sexywoman, 8, 0, man, 6, 4, PED_TYPE_GEN, VOICE_GEN_SOFYRI, VOICE_GEN_SOFYRI
***, DWFYLC5, DWFYLC5, CIVFEMALE, STAT_TOUGH_GIRL, woman, 30, 0, man, 1, 1, PED_TYPE_GEN, VOICE_GEN_DWFYLC1, VOICE_GEN_DWFYLC2


Don't forget to enter ID you want ped to have.