No Crowfeather is not a Loner.
Leafpool does not become a loner. She just becomes a warrior of ThunderClan and no longer the medicine cat.
leaf pool didn't even become a loner she still sits loyal in her clan Smokepaw the ghost whisperer
The only way for Leafpool and Crowfeather to be together would be to run away from there clans and take cover out somewhere new. Leafpool abondons her clan ways in order to fulfil her ambitious love for Crowfeather and because she didnt even feel needed in her clan in the fifth book of the second series.
Crowfeather's father is unknown.
Crowfeather is still alive and is in Windclan being deputy.
Leafpool's mate was Crowfeather. They had three kits -Jayfeather, Hollyleaf and Lionblaze.
Yes, Lionblaze is Crowfeather's son.
Purdy doesn't necessarily dislike Crowfeather. Crowfeather is a very young and arrogant cat when Purdy first meets him. Crowfeather insults and questions everything Purdy does which irritated Purdy.
leafpool and crowfeather leafpool and crowfeather
Crowfeather's kits are Breezepelt, Jayfeather, Lionblaze, and Hollyleaf.
Crowfeather's brother is mentioned in the Secrets of the Clans.
Yes, Leafpool and Crowfeather are Jayfeather's parents.