Mature
Experienced
Determined
Courageous
Resilient
Well-prepared
Resourceful
Irresponsible
Reckless
Self-sufficient
Someone who takes dangerous risks
Organised/organized, with everything you need for a situation
Brave
Good at finding ways to deal with something
Grown-up , behave well, like an adult
Able to recover quickly from difficult situations
Not sensible or reasonable
Not letting anything stop you once you´ve made a decision
Skilled or knowledgeable
Able to provide for yourself