what features were given to the second mentioned character, when designing the character?
She has "sophisticated, worldly experience", considered to be more of an adult than the rest of the cast, has a lot of "nervous energy" from trying to "find herself".
Characteristics
When developing the characteristics of their version of Lois Lane, the writers took inspiration from other leading ladies in cinema, for example, Karen Allen's character Marion Ravenwood, from "Raiders of the Lost Ark". Todd Slavkin describes the character as having a "sophisticated, worldly experience", and was considered to be more of an adult than the rest of the cast. Durance believes that she embodies many of the characteristics that the creative team wanted to show in their version of Lois, specifically the fact that Lois has a lot of "nervous energy" from trying to "find herself", the same nervous energy that Durance brings to the role. The actress also relates to Lois's sassy, and independent nature, but, conversely, she is not as extroverted as Lois. Gough describes the character as coming from the school of hard knocks; she is street smart, and a very capable woman. Durance believes her character is "fiercely independent", but at the same time she is not afraid to admit that 
when does clark meet lois lane in smallville Season 4 who played the above mentioned characters? Tom Welling and Erica Durance, respectively.
The writers took inspiration from other leading ladies in cinema, for example, Karen Allen's character Marion Ravenwood, from "Raiders of the Lost Ark". Todd Slavkin describes the character as having a "sophisticated, worldly experience", and was considered to be more of an adult than the rest of the cast Highlights were added to her hair.
Lois Lane (Smallville) Lois Lane (Smallville) Lois Lane (Smallville)
Characteristics Characteristics Portrayal
When developing the characteristics of their version of Lois Lane, the writers took inspiration from other leading ladies in cinema, for example, Karen Allen's character Marion Ravenwood, from "Raiders of the Lost Ark".  Todd Slavkin describes the character as having a "sophisticated, worldly experience", and was considered to be more of an adult than the rest of the cast.  Clark. To separate the physical appearance of Lana and Lois from each other, the producers had highlights added to Durance's hair, as she and Kristin Kreuk both shared a similar brunette coloring.
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Lois Lane (Smallville) [SEP] Characteristics
When developing the characteristics of their version of Lois Lane, the writers took inspiration from other leading ladies in cinema, for example, Karen Allen's character Marion Ravenwood, from "Raiders of the Lost Ark". Todd Slavkin describes the character as having a "sophisticated, worldly experience", and was considered to be more of an adult than the rest of the cast. Durance believes that she embodies many of the characteristics that the creative team wanted to show in their version of Lois, specifically the fact that Lois has a lot of "nervous energy" from trying to "find herself", the same nervous energy that Durance brings to the role.