Do you need Skype to apply for Helper? I don't have Skype because of safety issues, so I decided not to apply unless I get the answer that I don't need Skype or I decide to get Skype anyway.
*I think* you need skype to quickly communicate with other staff members when you need them, but I've heard that @Caitlynnnn doesn't have skype and is a Helper, since I'm not sure I'm going to tag a mod.
A skype account is a very important feature that helpers should have. You don't necessarily need to speak to other staff members, but you need it so that you can easily be communicated with via message. A skype account heavily increases your chance of becoming helper.