I have a good feeling about Sera's character mostly due to me having enjoyed the characters Lukas has written in the past, Carver, Aveline, Joker (in ME1 & 2), Kaidan (in ME1 alongside Drew & Chris L'Etoile, quote me if that's wrong Luke), probably forgetting some on KOTOR as well. His work on A Paragon of a Kind with Hepler was great. The characters mentioned have seemingly common traits with each other, specifically being quite "down-to-the-earth" judging from their overall disposition and personality in comparison to the other characters in the respective games.
Sera seems like a completely different sort of character than any of the above mentioned which sounds intriguing.