Let's see what I got...
Reimu - HakuReimu
Marisa - Marisasat ("Heretic Marisa")
Suika - Cyka
Mima -
MameeDaiyousei - Die-you-say?
Koakuma - Coca-cola
Patchouli - Patchiaolou (what my friends once pronounced it)
Sakuya - Hari Raya
Remillia - Remilliar ("Wild Remillia")
Letty -
BettyChen -
"Cen"dolYoumu Konpaku - Youmu Ber"Paku-paku" (Nailed Youmu

)
Yuyuko - Ikan "Yu" (Shark)
Ran - Panas Ba"Ran" (Impatient)
Yukari - Kari (Curry)
Keine - Kay nay (How my friends once pronounced it)
Aya - Daddy (Aya+h= Ayah = Father)
Komachi - "Kau Mak Cik?" (You're Aunt?)
Aki sisters - Grandpa (Dusun, Aki = Grandpa)
Nitori Kawashiro - Motori Kawasaki
Rin Kaenbyou - Bin Kain Bocor (Torn Clothes Bin)
Nazrin - Nazri (Our science teacher's name)
Kogasa - Kau gasak (You Rumble)
Ichirin - Itchy Rin
Murasa - Muramasa (Castlevania sword)
Byakuren - BAYAR KAREN!!! (Pay Electricity)
Nue - Noob
Hisoutensoku - Iso sen saku (No coin money)
Luna Child - S.T.F.U.
Star Sapphire - Radar
(Sunny is my Math teacher's name)
Seiga Kaku - Seiga Ter"Kaku" (Still-standing Seiga)
Mononobe no Futo - No No No NO!!!
Sekibanki - Sleepy Hollow
Benben - Beben (one of my friend's mid-name)
Most of it are how I say in my dialect...
To be contiNued...