There is no patron saint of siblings. There are, however, patron saints of similar causes. So, for example, the patron saints of families are Francis of Assisi, Joseph, and Maximillian Kolbe. The patron saint of dysfunctional families is Eugene de Mazenod. The patron saint of family happiness or harmony is Dymphna. Finally, the patron saint of family life is the Infant Jesus of Prague.
There is no patron saint of little sisters or big sisters.
I believe you mean the Patron Saint of Hope, that is St. Jude, who is the saint for hopeless causes and desperation. Hope was martyred along with her sisters Faith and Charity sending her soul immediately to heaven. She is a saint but not a patron saint.
Saint Laura of Saint Catherine of Siena was a missionary who founded the Congregation of Missionary Sisters of Immaculate Mary and of Saint Catherine of Siena. She worked among the poor, especially Indians, in South America. She is not currently a patron saint.
There are no patron saints of wayward girls but there are patron saints of girls:Agnes of RomeBlandinaCatherine of AlexandriaIreneMaria GorettiAs per the Patron Saint Index.
The Patron Saint Inex lists no patron saints of bears.
A patron saint is supposed to be a protector in the Catholic religion. Patron Saint Angelico is the patron saint of artists. A patron saint is a protector of life.
The Patron Saint Index lists no patron saint of dinosaurs.
As per the Patron Saint Index, there is no patron saint of wrestlers. However, Saint Sebastian is the patron saint of all athletics and athletes.
Saint Lillian is not a patron saint as per the Patron Saint Index.
No, there is no patron saint of billiards.
There is a patron saint of Wales but no patron saint of whales.
There is no patron saint of color.