If you're curious each of the months that correspond with each of the signs are listed above the sign it matches with. Also, Natasha is going to be included in this preference. :)

(December 22-January 19)

Capricorn: Clint Barton

(January 20-February 18)

Aquarius: Tony Stark

(February 19-March 20)

Pisces: Bruce Banner

(March 21-April 20)

Aries: Bruce Banner

(April 21-May 20)

Taurus: Clint Barton

(May 21-June 21)

Gemini: Loki Laufeyson

(June 22- July 22)

Cancer: Steve Rogers

(June 23- August 22)

Leo: Tony Stark

(August 23- September 22)

Virgo: Steve Rogers

(September 23- October 22)

Libra: Thor Odinson

(October 23- November 21)

Scorpio: Natasha Romanoff

(November 22- December 21)

Sagittarius: Thor Odinson