The game basically slaps you in the face and says "RECRUIT THIS ONE!"
When in doubt though, move Chrom close and see if he can talk to them. --- Uwe Boll makes terrible movies. Anyone who tells you otherwise is Uwe Boll - Seanbaby http://theanteheroes.com/AceAttorneys/DamonGant.png
Yeah, it's pretty obvious to figure out who is recruitable. If you do happen to skip the dialogue, most of the time they'll have a fairly different sprite on the map also if you're just glancing over it. And of course if you scroll over them they'll have a name and stuff.
I would think the major problem just lies with them getting killed before you can recruit them, though. --- GW2: Tannith - Henge of Denravi 3DS FC: 2019-9656-0978
when you select your member you should see a "TALK" above your guy and them. That shows this character can talk to him/her regards the distance. but you have to get closer to engage conversation. --- "co-op"