[quote=@Mr Allen J]
Well, the only person that would be logically skilled enough to shield their mind would be Mika (She's probably the most skilled Telepath out of the three). She'd be able to shield her minds much better when she absorbs Kana's and/or Lucy's power.
[/quote]

Trust me she's not going to want Lucy's power. Mika is currently limited to one person at a time and is very specific and precise about her mind reading. Lucy on the other hand has a massive range comparatively and almost no control over what thoughts she's taking in. Mika uses her power like a laser pointer while Lucy is like a flood light.