Helena pretty easyly. Helena defeat Gen Fu, Christie two times: one in doa 4 on doa's tower and another in doa 5 in a pub. She also defeat lisa twice, Leifang once and Bayman. Yes she defeat Bayman, because he told her that if she manage to hire him she has to beat him and in the 5th installment Bayman works under Helena. Helena beat alpha in doa 3 too. Helena only defeats come by the hand of Ayane(doa 2), Hayate(doa 3) and Kasumi(doa 4). She won every fight but these three and we all know that ninja characters are top tiers in doa. Tina lost three times with Bass and won only one time. She won with Mila once, but also lost with her. She won a tag duel against Brad and Eliot with the help of Mila and these two beat Leifang and Hitomi but she also lost with two pro wrestler in her doa 4 ending and Lisa manage to beat both together to save her. Lisa lost two times with Helena. So Helena cubstomp Tina. Leifang, Hitomi, Eliot, Kokoro, Mila and Tina are all on the same level more or less.