There are many great prayer warriors in the bible and Daniel is thought of as a great prayer warrior because of his bravery and confidence in the lion's den. Even in the face of execution, Daniel gets on his knees and keeps on praying.
Lots of times we often pray the hardest when faced with our own hardship or the hardships of our loved ones. Daniel was a prayer warrior as he prayed daily, seeking God constantly. That face alone is remarkable when you consider the time he lived in, it's downright amazing. Daniel's story illustrates how being faithful to God requires obedience and standing firm in your convictions.