will no longer downplay any signs of depression knowing that externally people may seemed great but within themselves, and their own minds, they are fighting a war.

Yep, to show a positive attitude while internally dealing with depressive thoughts is quite commons.

A lot of suicides are a surprise because the person didn't show any symptom of depression, and in a way, it makes sense, because it can be easier to simply pretend being ok, than to deal with all the repercussions of accepting you have a serious problem.