Ayane's 4P is -15 on block and has a high & low follow-up. However, beware that the blockstun is very short and your window to punish the move is very small. Whenever, you block 4P, immediately punish it with a 2P to stuff the follow-ups. An Ayane player doing 4P~ then 7K right after is bullshitting you. Take note that BT7K is i11 and can crush both highs & lows.