Dr. Light's most dedicated helper, Roll's just about always sweeping around his lab with broom in hand. She's a joyful sweetheart to nearly all she meets, always encouraging Mega Man whenever he needed it. She sought to do the same when he entered Battle & Chase...but being unable to resist the urge to drive, she joined with Beat the bird modified into the car Pop'n Beat.

 
Admittedly, I'm not a big fan of any English takes on her, so I'll say that for me, I want her to have a voice that embodies the young kid sister. Very cutesy and innocent, but cheery and stubborn.

Optional Singer: If you're comfortable with singing as Roll as well, here's her theme Kaze Yo Tsutaete to use as an example https://youtu.be/iLHdk1iqM1Y?feature=shared