Like as in she seen good in him that Simba and possibly everyone else didn't. (besides Mufasa and Rafki) Because during the scene of Kovu getting exiled everyone (besides obviously Kiara and Rafki) she was the only one not to be angry at him.
Hmm, maybe she did. But wouldn't she try to tell Simba to give Kovu a chance, then? For example, the scene right before the exile song where Simba wasn't allowing Kovu to explain. Nala probably would have stopped Simba and allowed Kovu to give his explanation, but she didn't. Though it still is possible that Nala could have liked Kovu, despite that.