He is often called "Commander Lester", and he is unable to match Near's in intelligence and analytic skill despite being very intelligent. Nevertheless, being trustworthy, athletic, and a quiet person make him very useful to assist Near. How to Read states that he can be seen as Near's guardian. He's also the only member of the SPK that Near is sure has never been seen by Kira.
The one shot happening after the main series reveals he continues to work with Near, the new L, and Halle Lidner.