"rádi" is for plural masculine and it can be either:
my máme rádi - we like vy máte rádi - you (pl.) like oni mají rádi - they like
This construction "mít rád" is connected to gender of the person, rather than pronouns. So, it will also be:
on má rád - he likes ona má ráda - she likes
já mám rád - I like (for a man) já mám ráda - I like (for a woman)
The pronoun is declined and has different cases in the same way nouns do. Mít rád requires the accusative case for the object and hence the pronoun in the question is in the accusative case.
Remember, in English the pronoun can change too, although it may sound old-fashioned: who->whom.
Who is correct enough and hence used in the main answer. Only words for the main answer are offered in the word tiles by the computer. We do not influence the word tiles in any way.
If you want to answer in a different way, you are free to do so, but you must switch to enterimg your answer from keyboard. You may have to get to a higher crown level first or switch to th web version for that, I am not sure about the current software features.