How could I complete an assignment that requires writing a note on the character of Silas in Silas Marner?

The first descriptor that fits Silas's character is "dynamic." This type of character is one which changes throughout the novel, as circumstances change around him. The fact that he actually changes makes Silas someone who is also in touch with his feelings, and aware of his surroundings. However, before his change, Silas was not like that. 

When Silas lived in Lantern Yard, he was a complaisant man. He had fallen in a comfortable routine, where he was surrounded by familiar faces on whom he always counted. He became, in fact, way too trusting. He was so comfortable, that he missed all the signs and red flags that were popping up all around him. His childhood friend, William Dane, felt jealous of the good reputation that Silas acquired in among the people of his religious sect. As a result, he framed Silas for theft, ruined his reputation and stole his fiancée, Sarah. 

These events left Silas defeated, angry, and wanting to be isolated. He felt so hurt by the acts of the people whom he once considered his "family," that he chose to give up altogether any contact with people. However, once in Raveloe, Silas still had his humanity intact; he was just to scared to connect again. And who wouldn't be, after what happened to him?

When he decides to switch his anger into greed he essentially begins to focus on something else; this time, it would be money- not love, not friends, nor family. As he stored his gold, he felt that he had an upper hand on his past. He may not be happy, but he will be rich. Gold became the substitute for the love that he lacked and yet wished to have so desperately. 

After the second major event, the theft of his gold, sends Silas into a shock, he also comes across Eppie: the baby that saves his life. It is Eppie who brings out all the good traits that Silas wanted to conceal from the world in fear of getting hurt. Baby Eppie brought back the humanity in Silas, made him a whole man, as he used to be broken. She also made him a better person. With all of this, we can safely conclude that Silas is a very good man who was done very wrongly. He did not deserve what happened to him at all. He got a second lease on life thanks to Eppie, and he was able to recuperate from his sad past.