Here's the UST we'll be using. Playing this UST will make the vowel (o) come out very striking after the "na", since Miki is recorded as having a very strong VB. So here's what we'll do to smooth it out.
Select the "o" note, hold the SHIFT button and right-click the note. This list should pop up, here you choose the "a o".
Here's the result! This way, it will play as "minao" instead of "mina o". This is a technique that can be applied to ANY vowel in his voicebank - thus "vowel VCV".