Sankaku Channel/

Pile is a voice actor, a singer and an actor. Her real name is 堀 絵梨子(Hori Eriko). She uses real name with actor of movie and TV drama. Pile is used with voice actor and singer.
Except for her photo as actor, pile_(voice_actress) or pile_(seiyuu) should be used.

M・A・O whose real name is 市道 真央(Ichimichi Mao) is an actor and a voice actor. M・A・O is only used with voice actor. She played luka_millfy in kaizoku_sentai_gokaiger as actor.
Although M・A・O can be used with seiyuu_connection, would not be used much in other.

KENN is a voice actor, an actor and a singer. His real name is 大橋 賢一郎(Oohashi Kenichirou). KENN is used with voice actor, actor and singer. His real name is not used for work.
KENN(kenn_(voice_actor)) should be used for tagging.

According to recent Tag Translations, who knows very well about pokemon character name is you and masasmi.