There are of course hundreds, if not thousands of descriptive adjectives to choose from, so it can be a challenging exercise to nail it down to 5. For now, write the ones that intuitively come to you.
In other words, how do you want stakeholders to feel when they interact with your organizational brand? What are the words that should spring to mind when your audience sees your branding and website? What adjectives should they associate with your visual elements?
Here's a tiny list to get you going: Adaptable, Brave, Cheerful, Romantic, Loyal, Respectful, Reliable, Kind, Compassionate, Generous