Description: 

Trunks (トランクス, Torankusu) is the first Earthling and Saiyan hybrid son of Bulma and Vegeta, and the older brother of Bulla.  As a child during the Majin Buu arc, Trunks is shown to be quite cocky and stingy just like his father, as well as mischievous, most likely due to the fact that this Trunks grew up with his father Vegeta and enjoyed the luxuries of peace, while Future Trunks grew up without Future Vegeta and in an apocalyptic world, causing him to be much more serious and cautious.

Voice Direction: 

 Trunks has a combination of both of his parents' personalities: cocky and proud like his father and spoiled and selfish like his mother. He refuses to respect someone he does not like, another trait he shares with his father. This is shown when he disrespects Goku when they first meet, as Trunks believes he is not as strong as his father and again when he wondered why he wasn't present when his father was killed. He is shown to be loving towards his parents and grandparents and will not think twice about defending his family. Trunks tends to usually take control over the younger Goten, stating to him numerous times how he is both older and stronger (during childhood).

For reference, Click on these links. You can try impersonating official VA's for the character or do your own interpretation for Trunks: 

Laura Bailey: https://www.youtube.com/watch?v=x_cmZyYHMTk

                         https://www.youtube.com/watch?v=_9Mveut7w2I  

Alexis Tipton: https://www.youtube.com/watch?v=GhSGMrvwibg 

(Note: In Dragon Ball Super, Kid Trunks is voiced by Alexis Tipton. Her Trunks voice hasn't been heard yet but Try to go for a Trunks voice, but in her voice. Imagine how Trunks would sound with her voice.)