For Virgo ascendants, Sun is the lord of 12th house and it is placed in the 12th house itself in the leo sign. so this will be in the moolatrikona sign.

Sun is the significator of the father, so fathers placement in the 12th house and Sun is functional malefic for virgo asc. so there may be lots of differences with one’s father. and Moolatrikona SUN in 12th house brings the situation where person would confront or insult father. Person has to stay away from the father. But his father would be government servant viz. class 1/2 officer or IAS, IPS or politician here. Father is dignified in his chart but your father could not help you or you are not supported by your father. may be father has gone abroad, or you have left for abroad very early in the age or may be natural demise of the father or anything else but here you will not get fathers support. and always wandering for getting love from fatherly figures. In certain cases relationship between you and father would not be harmonic.

I hope I have explained.