Leon and Ada having a tender moment in 2 after Birkin injures Ada and Leon fights him off, seen here.
Leon: I told you, it's my job to look after you.
Ada: But, you'll be in danger if you stay with me. I know I've only known you for a short period of time, but I really enjoy being with you.
Ada: I know, I'm not capable of caring about anyone, but, I don't want to lose you.
- All the times Ada helps and saves Leon from then on shows she means it.