I asked Messenger of Allah ﷺ about a virgin whose marriage is solemnised by her guardian, whether it was necessary or not to consult her. Allah's Messerger ﷺ said: Yes, she must be consulted. 'A'isha reported: I told him that she feels shy, whereupon Messenger of Allah ﷺ said: Her silence implies her consent.
سَمِعْتُ عَائِشَةَ تَقُولُ سَأَلْتُ رَسُولَ اللَّهِ ﷺ عَنِ الْجَارِيَةِ يُنْكِحُهَا أَهْلُهَا أَتُسْتَأْمَرُ أَمْ لاَ فَقَالَ لَهَا رَسُولُ اللَّهِ ﷺ نَعَمْ تُسْتَأْمَرُ فَقَالَتْ عَائِشَةُ فَقُلْتُ لَهُ فَإِنَّهَا تَسْتَحْيِي فَقَالَ رَسُولُ اللَّهِ ﷺ فَذَلِكَ إِذْنُهَا إِذَا هِيَ سَكَتَتْ