Recon X Leafa
Otp alert. Honestly, what else can you ship with Leafa? Kazuto? No. The incest ship barely makes sense. Klein? Nope. No. Gross. No offence, but I couldn't ever ship Leafa with anyone else. Recon on the other hand, I have heard of ships with him and Lisbeth and ones of him and Shino. But for me, Sugunichi, or Leacon, makes the most sense.
10/10
Reasoning:
It's almost canon. Recon likes Leafa, and Leafa, though she didn't accept it, probably would've ended up liking Recon if it wasn't for Kazuto!