Who am I?

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Across
  1. 5. an animal that is big and grey
  2. 7. Not giving up on something
  3. 8. Able to adjust to new conditions
  4. 11. A sport played with a ball
  5. 12. Showing good manners
Down
  1. 1. Careful not to harm others
  2. 2. Clean and not messy
  3. 3. Willing to agree to something
  4. 4. Giving and sharing things
  5. 6. Willing to help other people
  6. 9. Good and truthful
  7. 10. Not showing or feeling strong emotions