Silver is best described as having "a strong sense of justice" and it is this personality trait that motivates him to go back into the past in order to correct his future. He believes in standing up for those who cannot stand up for themselves. This led him to accept Blaze when everybody else was teasing her for her pyrokinetic abilities.[citation needed] He makes alliances and rivalries very easily and takes people's word without question. Silver has been described as mysterious and enigmatic on several occasions, with not much being known about him or his powers.[21][22][23][24]

Although seemingly serious on the outside, it has been stated that Silver is young and somewhat immature.[25] He has been described as naïve, rash, and reckless. That does not mean, however, that he is incompetent, as Eggman Nega once said that he is very perceptive and that he rarely falls for his tricks.[26] With little information to draw upon, he lets his intuition guide him, but as a relatively isolated person, he has little understanding of interpersonal relations or the subtle tools of manipulators.

For him I would like Pete or Quinton but any voice is fine! If you wanna do your own take for Silver go right ahead!
Voices:
https://www.youtube.com/watch?v=9SO5hUntmHA