I quite like the look of this n its got a decent trunk
Euonymous - possibly japonicus.
Bonsai material? Its up and potted cos is favourite lol
Just as a personal thing, it's hard for me to get too excited about variegated material, but if you overlook that thought it could otherwise make a believable bonsai. They are very susceptible to aeuonymous scale - especially if they get weak; and large galls on stems and branches are common (crown gall). Best luck with it, though.