She's emotionally stunted, rarely showing great bouts of emotion. Mal never gets needy, but can be extremely in some cases in wanting to show her gratitude.

She respects "Savior" a lot, having been under their wing since she was extremely young, as well as "Savior" having saved her life. 

It's extremely difficult to get her flustered, let alone make her yelp, being calm and collected at nearly all times.

She's eighteen now *(to clarify, specifically in dog years.)*