These are how the names are pronounced in the story just so you have an easier time reading them
Arira- Are eee
Pigo- Pie
Yio- U eeee
Bika- Bee ka
Mgio- Mo
Siyo- Suh eye oh
Jis- J is
Dirfo- Dee fo
Wlip- Wi
Nlio- Nee low
Juj- ju gee
Riom- Ree om
Piqlo- Pi coo