Its hard to tell since he hasn't been a leader for long, his deputy may die and be replaced a couple of times before he looses his nine lives.
Whitetail and Onestar did not become mates in the Warriors series. Whitetail is a warrior of ThunderClan and Onestar eventually became the leader of WindClan, but they did not develop a romantic relationship in the books.
No I doubt it. Because he is a fair leader.
Onestar
He hasn't died yet, but he has to eventually!So read omen of the stars
status unknown
Onestar
Onestar is the WindClan leader after Tallstar. Onestar's warrior name was Onewhisker, and he and Fireheart became friends when Fireheart and Graystripe brought WindClan back. When Tallstar was about to die, he told Firestar that he did not want his deputy, Mudclaw, to rule WindClan, and he made Onewhisker the leader right before he died.
Onestar wanted a war with ThunderClan because he thought ThunderClan stole WindClan's kits, and he wanted them back.
brown tabby :)
In which book are you talking about?
Kestrelflight and Heathertail. The father is Onestar.
No one can answer that until it happens--or doesn't happen--in one of the next books.