[quote=@Raven_Operative]
I could probably try... Me and slyph have been in the RP the longest so we probably have the best grasp of his character, but I'm rarely good at role playing other people's characters accurately.
[/quote]Key to RPing the characters of others to learn playing stereotypes.
Try to fit the player's character into a certain stereotype or the mixture of two, then act with him accordingly.
For more advanced mimicry it's advised to recreate the character in your own mind. What if you created Harald with the same features? How would you play him?One of the main points is to never be bothered how the actual player would control the char. You can't read minds so attempting to play Harald exactly like Leon would do is a sure mixture for failure. Remain faithful to the already established stuff but on the other hand you do have a degree of freedom here. Rare times the owners even got praised me to RP other's characters better than they did. I'm not really saying this to brag but to show you aren't bound to replicate everything to the last detail.
Be at ease.

Anyways, nobody expects you to completely replace Leon so don't worry about that.
The point is just to advance the plot in his absence as he permitted us to do.
Pardon for the mini lesson and I'm just saying that you don't need to be nervous about it.
So long it's passable everybody will be satisfied.